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Re: A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
Expert Reply
AvikSaha wrote:
Hi chetan2u, Thanks for the reply.
But as per Official Guide solution 1 is Current Issue and 2 is Past Issue.
Can you address the discrepency!



H AvikSaha
At times we tend to miss out finer point in a hurry.

To avoid this mistake, I feel VennDiagrams are the best and I’ll edit and add a video so that it becomes even clearer.


Statement: For the orders placed to the company today, if one employee were to package all of the orders that include a ___1___, that employee would also package all of the orders that include a ___2___.
The employee is packaging 1, and this is leading to all 2 also getting packed
This means 2 is a part of 1 and this changed in If-then becomes
If 2, then 1.

When we compare it with: If past issues, then current issue.
1. Current issue
2. Past issue
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Re: A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
This is Tricky.
The second statement about the orders placed today implies that -All of those that include a past issue of the magazine also include the current issue of the magazine.

Then why cant we say that if an employee were to package all the orders containing a past issue of the magazine, then the employee would also package all the orders containing the current issue of the magazine ?

It is mentioned that a past issue will surely contain a current Issue.
KarishmaB chetan2u ScottTargetTestPrep MartyMurray GMATNinja GMATWhizTeam
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A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
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Dwadesh72 wrote:
This is Tricky.
The second statement about the orders placed today implies that -All of those that include a past issue of the magazine also include the current issue of the magazine.

Then why cant we say that if an employee were to package all the orders containing a past issue of the magazine, then the employee would also package all the orders containing the current issue of the magazine ?

It is mentioned that a past issue will surely contain a current Issue.
KarishmaB chetan2u ScottTargetTestPrep MartyMurray GMATNinja GMATWhizTeam

Consider this: What if someone had ordered only the current issue? Will they get the past issue too? No. There could be people who ordered only current issue and get only that. Those who ordered past issues, all ordered current issue too.

So can we switch the order to "past issue" and then "current issue"? No.

Your "past issue" is a subset of "current issues" so you must include all current issues to ensure that all past issues are included.

Check this video in which I discuss this point in detail using one of my own questions: https://youtu.be/O-iV8Vv4svY
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Re: A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
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Quote:
A certain mail-order company sells T-shirts, buttons, stickers, and current and past issues of its magazine. Each order placed to the company consists of one or more items and, for each order, the company packages all of the items in the order together. Any employee who packages an order, packages the entirety of that order. Among the orders placed to the company today:
 
  • None includes both a T-shirt and a magazine.
  • All of those that include a past issue of the magazine also include the current issue of the magazine.
  • Most of those that include a magazine also include a sticker.
  • None of those that include a button also include a sticker.

Statement: For the orders placed to the company today, if one employee were to package all of the orders that include a ___1___, that employee would also package all of the orders that include a ___2___.

Select for 1 and for 2 the two different options that complete the statement so that it is most accurate based on the information provided. Make only two selections, one in each column. 

Consider the statement with blanks: 
For the orders placed to the company today, if one employee were to package all of the orders that include a ___1___, that employee would also package all of the orders that include a ___2___.

We need a definitve answer for two things that will go together. Hence we focus on:
All of those that include a past issue of the magazine also include the current issue of the magazine.

This tells us that if past issues are included, so is the current issue. This means that "past issues" are a subset in the set of orders that had "current issue". Some people may have ordered just the current issue. But those that ordered the past issues, had ordered the current issue too. 
So past issues circle is inside the current issue circle. 

So if an employee packs all order that include a current issue, authomatically he packed all orders that include a past issue too (since past issue is a subset of current issue)
But if an employee packed all orders with past issues, does it mean he packed all orders that carried a current issue? No. As we discussed, there may be some orders that had just the current issue. Past issues are not necessary in that order. 

ANSWER: 1 - current issue, 2. Past issues
 

Check this post for a discussion on two part analysis and another such question: https://youtu.be/O-iV8Vv4svY
­
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Re: A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
AnishPassi wrote:
AvikSaha wrote:
Hi MartyMurray,

Can you please let me know why 1 is current issue of magazine & 2 is past issue of magazine?
And it is not the other way that is 1 as past issue of magazine & 2 as current issue of magazine?

Thanks in advance!

­
Let me try to address it.

1. We're told:
Quote:
All of those (the orders) that include a past issue of the magazine also include the current issue of the magazine.

So, can an order contain
a. only a past issue of the magazine?
No. Because all orders that include a past issue also include the current issue.

b. only a current issue of the magazine?
Yes. All orders that include a past issue will also include the current issue. But, an order with the current issue could be made without including a past issue.


Now, on to the statement.
Quote:
 Statement: For the orders placed to the company today, if one employee were to package all of the orders that include a ___1___, that employee would also package all of the orders that include a ___2___.

First off, the statement is not:
If an order includes ___1____, the order would also include ___2___.

The statement is not about an individual order. We need to figure out what else we can state about an employee who has packaged all of the orders that include a particular item (1). 


Are the following orders valid? (For simplicity, I am going to ignore all the other items and focus only on magazines.)

Order 1: A past and the current issue of the magazine
Order 2: Only the current issue of the magazine
Order 3: Only a past issue of the magazine

Oder 1 is valid. An order can include both kinds of issues.
Order 2 is valid. An order can include only the current issue.
Order 3 is not valid. All orders that include a past issue will also include the current issue.



Now, say an employee were to package all orders that include a past issue of the magazine.
Can we say that the employee would also package all orders that include the current issue of the magazine?

No.

E.g. an employee may package order 1 (past and current issues both). But a different employee may package order 2 (only current issue).


But, say an employee were to package all orders that include a current issue of the magazine.
Can we say that the employee would also package all orders that include a past issue of the magazine?

Yes.

The orders that include a current issue of the magazine would be a superset of the orders that include a past issue of the magazine. 

So, if an employee were to package all the current issue orders, the employee would also certainly package all the past issue orders.

Put another way, if an employee were to package the superset, the employee would also certainly have packaged the subset.


Answer:
1: Current issue of the magazine
2: Past issue of the magazine
 ­

­better explanation than the OG explanation!
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Re: A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
 
Quote:
A certain mail-order company sells T-shirts, buttons, stickers, and current and past issues of its magazine. Each order placed to the company consists of one or more items and, for each order, the company packages all of the items in the order together. Any employee who packages an order, packages the entirety of that order. Among the orders placed to the company today:
 
  • None includes both a T-shirt and a magazine.
  • All of those that include a past issue of the magazine also include the current issue of the magazine.
  • Most of those that include a magazine also include a sticker.
  • None of those that include a button also include a sticker.

Statement: For the orders placed to the company today, if one employee were to package all of the orders that include a ___1___, that employee would also package all of the orders that include a ___2___.

Select for 1 and for 2 the two different options that complete the statement so that it is most accurate based on the information provided. Make only two selections, one in each column. 

 
Quote:
Consider the statement with blanks: 
For the orders placed to the company today, if one employee were to package all of the orders that include a ___1___, that employee would also package all of the orders that include a ___2___.

We need a definitve answer for two things that will go together. Hence we focus on:
All of those that include a past issue of the magazine also include the current issue of the magazine.

This tells us that if past issues are included, so is the current issue. This means that "past issues" are a subset in the set of orders that had "current issue". Some people may have ordered just the current issue. But those that ordered the past issues, had ordered the current issue too. 
So past issues circle is inside the current issue circle. 

 

hi @KarishmaB
all above , i can 100% get it.
but the following , i am afraid i'm not.
Quote:
So if an employee packs all order that include a current issue, authomatically he packed all orders that include a past issue too (since past issue is a subset of current issue)

actual, i thought 
if include current issue, it possibly includes other subset of current issue, that means not past issue.

like this
all squares are quadriliaterals. squares are subset of quadriliaterals.
if it is a square, then it must be quadriliateral
but 
if it is a quadriliateral, it maybe rectangle, another subset of quadrilateral.

please clarify further

thanks a lot


­
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Re: A certain mail-order company sells T-shirts, buttons, stickers, and cu [#permalink]
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