In a library,1/5are maths books, 1/8 are hindi books,1/12are Hindi books and the rest are evs books. If the number of evs books are 142, find the total number of books in library.
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Step-by-step explanation:
1/5+1/8+1/12=24+15+10/120=49/120
1-49/120=120-49/120=71/120
71----------142
120--------?
120×142/71=2×120=240
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