a man purchase a few books.25% of them are book of math,30% of them are book of science.after this,the reamain books are 15.find the total number of books purchased by the man
Anonymous:
15 is not right. 18 works better
the number of books should be an integer. that is why 15 is wrong
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percentage of remaining books =100-(25+30)
=100-55=45
let total books =x
45%of x=15
45/100×x =15
45x=1500
x=1500/45
=33.3= 34 books
=100-55=45
let total books =x
45%of x=15
45/100×x =15
45x=1500
x=1500/45
=33.3= 34 books
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