A man bought some mangoes at Rs12 per dozen and bought the same number of at Rs 10 per kg. He sold these mangoes at Rs 13 per dozen and gained Rs 160.The total number of mangos bought by him are	Choose the correct choice:
A) 40dozens	B) 60dozens	C) 70dozens	D) 80dozens	E) 90dozens
let total no of mangoes is 2x..   then we profit=sp-cp   160=13*2x-(12x+10x)   160=4x   x=40   hence 2x=80   so total no are 80dozens   ANSWER:80dozens
<result>D</result>
A man bought some mangoes at Rs12 per dozen and bought the same number of at Rs 10 per kg. He sold these mangoes at Rs 13 per dozen and gained Rs 160.The total number of mangos bought by him are