Question

A man pays Rs. 6.40 per litre of milk. He adds water and sells the mixture at Rs. 8 per litre, thereby making 37.5% profit. The proportion of water to milk received by the customers is
A) 1 : 10
B) 10 : 1
C) 9 : 11
D) 11 : 9

Answer 1

I think the answer is option

B