Re: Mary Poppins is choosing presents at a certain book shop. She wants
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11 Oct 2022, 18:11
B should be the answer
Out of a total of 11 or more books , he chose 5 poetry books such that
0.45< 5 poetry books will be <0.5
1 will not work because if it’s total 3 books, then 1 poetry of 2 total books= 0.50 . This is not possible because it has to be less than 0.50
1 will also not work because if it’s total 3 books, then 1 poetry of 3 total books= .333 is less than 0.45. The fraction should be greater than 0.45
If it’s total 4 books , then 1 poetry book out of 4 total books= 0.25 which is less than 0.45
As number of books increase , the 1 out those many total books goes further and further lower than 0.45
How I got it?
Say x/100 is the fraction of poetry books
45/100 < x/100 < 50/100
9/20 < x/100 < 10/20
9/20 < (x/20) * (1/5) < 10/20
1/5 is the odd fraction that needs to convert to an integer because number of books need to be an integer . So 5 is the answer I think. Choice B
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