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Re: Quant Question of the Day Chat [#permalink]
haha, yeah. it’s a very handy tip for many questions in GMAT quant
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Re: Quant Question of the Day Chat [#permalink]
thank you for your asking, it increased me awareness about this formula when it comes to the comparability :)
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Re: Quant Question of the Day Chat [#permalink]
HenryHai wrote:
excuse me, what does it mean “ all “ here ? is it 3-area overlapping or all about something you want to mention ?

Yes - all means the possible 3 overlap. Both means those that overlap twice
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Re: Quant Question of the Day Chat [#permalink]
mysterymanrog, - can you tell me how to get the max value of n(exactly two sets) please?
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Re: Quant Question of the Day Chat [#permalink]
Dumsy_1711 wrote:
mysterymanrog, - can you tell me how to get the max value of n(exactly two sets) please?

You know that all=(22-both)/2
All cannot be a negative number or a non-integer. So both must be less than or equal to 22. Since 22 is even, both must be even as well - so the largest value is 22.
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Re: Quant Question of the Day Chat [#permalink]
Can we solve this question by wavy curve method?
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Re: Quant Question of the Day Chat [#permalink]
12922 wrote:
Can we solve this question by wavy curve method?

You can you that method to identify the ‘sign’ of each expression in lhs in the intervals
1)<3
2)(3,4)
3)>4
Then solve to get x in each interval.

My approach - as it’s the sum of mods, I’ll just check the extremes of each choice. Both should be 2 as the question says ‘set of all’. So D will be the answer.
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Re: Quant Question of the Day Chat [#permalink]
tirpude wrote:
You can you that method to identify the ‘sign’ of each expression in lhs in the intervals 1)<3 2)(3,4) 3)>4 Then solve to get x in each interval. My approach - as it’s the sum of mods, I’ll just check the extremes of each choice. Both should be 2 as the question says ‘set of all’. So D will be the answer.

Yes ans is D.

In Wavy Curve we have to make eq less than or equal to 0 right? What we will do of 2 in Question? If possible can you explain by drawing wavy curve please
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Re: Quant Question of the Day Chat [#permalink]
I’m not allowed to add any attachments. ☹️
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Re: Quant Question of the Day Chat [#permalink]
By selling 20 items, a shopkeeper gains an amount equal to the selling price of 5 items. What is his percentage gain?
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Re: Quant Question of the Day Chat [#permalink]
Wait, whats the solution?
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Re: Quant Question of the Day Chat [#permalink]
Let y=CP x=Sp so 20(y-x)=5x we need to solve to get (y-x) /y *100
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Re: Quant Question of the Day Chat [#permalink]
Why can’t it be 5/20?

Whats CP?

SP is selling price right?
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Re: Quant Question of the Day Chat [#permalink]
Malar95 wrote:
Why can’t it be 5/20?

Because profit or loss is on the CP or cost price and here it is 15
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Re: Quant Question of the Day Chat [#permalink]
Thanks for the clarification

*drowns in profit formulae*

Sorry to rebut. But the best formula to use is profit/revenue for profit measurement not profit/COGS (cost of goods sold). Is there a reason why the later why used?

Nvm. Got it
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Re: Quant Question of the Day Chat [#permalink]
It’s good to be reminded of subtle silly mistakes that should be avoided in the exam. Thanks. 😃
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Re: Quant Question of the Day Chat [#permalink]
I did ACCA bro, I feel dumb right now. But its a good reminder for me to get my head out of that space for any finance Quant Qs

Thanks for helping me ☺️
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