An activist club is advocating against the opening of Walmart in

Question

An activist club is advocating against the opening of Walmart in a city and has decided to go to the Mayor's office every day. The secretary of the club has proposed taking exactly 4 people with him every day. If the secretary goes with a different group of people every day, including weekends and holidays, how many days can he go without repeating a group?

(1) The club has 10 members.

(2) Every day, the secretary does not take exactly 5 members of the club with him.

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Matthyrou · Answer

weird qu. 
What does the 2) section mean, because it is meintioned above that the secretary wants to take 4 peoples with him though, the 2) mentioned 5...
Also, it is not mentioned that the 4 peoples have to be from the club, if we are taking these informations into account, we can't solve the pro, 
so E

pavkuml · Answer

But, if we just consider (A) we can answer the question. Doesn't it mean option (A)   is the correct choice?

Matthyrou · Answer

that's the point, i think we can't because in the informations, it is not mentioned that the group has to be made by members from the club...

EshaFatim · Answer

Hey, I can see how that might have boggled you. let me try to clarify it -

The question is really asking about how many groups of  4 people  the secretary can take from the 10 club members. I know it's not specifically mentioned. But it's nowhere hinted either that there can be people from outside. So let's go with the simplicity first - so let's see if we can solve the math assuming it's about club members only. Given that, any other information from the options should be interpreted along this stem of information because this is the main idea.

Statement (1)  tells us there are 10 members. From this, you can calculate how many different groups of 4 can be chosen. That’s all the information needed to solve the problem, so  Statement (1) is enough on its own  to get the answer. 
  Statement (2)  just says the secretary doesn’t take 5 people. But we already know he’s supposed to take 4 people every day (as mentioned in the original problem). So,  Statement (2) adds no new information . It just repeats what's already clear from the problem. Even if you want to consider option B per se, you can't solve it without option A as you need the total number of club members. So option B gets deducted there anyway almost like it doesn't matter.

In short,  Statement (1) should be enough.  However I can see how sometimes unexpected complicated thought processes can take over, but in cases as such, try to not think out of the box with extra information outside what's given or WHAT'S NOT HINTED. Because that just clouds the brain even more if nothing. This happened to me as well in DI and Verbals, but I personally start with simple thinking first. If I get an answer, I don't try to overthink it or question the stem, both of which are very naturally tempting. If the simple thought doesn't lend you enough help, most welcome to criticize it harshly to really get into it. But for me, simplicity in thinking initially made resolves easier.

Hope that helps. Now if the answer is really not A, Imma be so bumped lol.

EshaFatim · Answer

Hi  Bunuel ,
Could you explain how option B can solve the question independently? How can we infer that the total number of club members is 10 from that information? It could be any number (11,12,13,60,46 etc.) from which the proposer doesn't take exactly 5 members, right?

stne · Answer

(1) The club has 10 members .

That means that there is a secretary + nine other members.

9_C_4 +5_C_4

First day from  9  he has to choose  4,  second day from  5  he has to choose  4,  Third day he has to repeat previously taken members, because there is only ONE fresh member left.

SUFF.

(2) Every day, the secretary does not take exactly 5 members of the club with him.

This means that after the secretary  +\hspace{2mm} 4  other members were chosen. There were still  5  members remaining in the club.

Thus total members in the club =   10

This tells the same thing as statement 1. We can follow the same logic as discussed in statement 1.

SUFF.

Ans D

Hope it helped.

An activist club is advocating against the opening of Walmart in

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