A detailed worked out solution for this is given on this link:
https://www.beatthegmat.com/hardcover-books-t15572.html
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Source: Beat The GMAT — Data Sufficiency |
this is a problem where words will confuse you.
trap 1: number of paperback books more than 10 (>)
total cost is less than (<) 260
now once you rule out 1 and 2 independently and take them together.
from 1 we get hardcover should be greater than or equal to 6.
put number of hardcover = 7
total cost 175
hence cost for paperback less than (260 -175) ==> < 85 if that is the case then he can not buy more than 10 paperback hence only if hardcover book's number is 6 all the conditions get satisfied.
Hence answer is C.
trap 1: number of paperback books more than 10 (>)
total cost is less than (<) 260
now once you rule out 1 and 2 independently and take them together.
from 1 we get hardcover should be greater than or equal to 6.
put number of hardcover = 7
total cost 175
hence cost for paperback less than (260 -175) ==> < 85 if that is the case then he can not buy more than 10 paperback hence only if hardcover book's number is 6 all the conditions get satisfied.
Hence answer is C.
