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# logical counting

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Intern
Joined: 05 Jan 2019
Posts: 1

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05 Mar 2019, 01:33
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In a box there are 30 physics,30 chemistry,30 biology, 80math,90 history books. what is the minimum no of books to be taken out to ensure that there are 2 sets of 60 each of the same subject?

can anyone please provide a solution to the above qt?
Math Expert
Joined: 02 Sep 2009
Posts: 53716

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05 Mar 2019, 01:52
ankitakhithani wrote:
In a box there are 30 physics,30 chemistry,30 biology, 80math,90 history books. what is the minimum no of books to be taken out to ensure that there are 2 sets of 60 each of the same subject?

can anyone please provide a solution to the above qt?

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Re: logical counting   [#permalink] 05 Mar 2019, 01:52
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