question_answer

In what ratio must a grocer mix teas worth Rs. 60 per kg and Rs. 65  per kg, so that by selling the mixture at Rs. 68.20 per kg, he may gain 10%

A) 3 : 2

B) 3 : 4

C) 3 : 5

D) 4 : 5

Correct Answer: A

Solution :

[a] SP of 1 kg mixture = Rs. 68.20, Gain per cent = 10% CP of 1 kg mixture             \[=\text{Rs}\text{.}\left( \frac{100}{110}\times 68.20 \right)\]             = Rs. 62 (Cheaper tea): (Dearer tea) = 3 : 2