1)

In what ratio must a grocer mix two varieties of tea 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

Option A

### Explanation:

S.P of 1 kg of mixture =Rs.68.20, Gain=10%

C.P of 1 kg of mixture  $=\frac{100}{110}\times 68.20=Rs.62$

By rule of alligation

Cost of 1 kg tea of 1st kind =Rs.60 +2 to mean price 60

Cost of 1 kg tea of 2nd kind =Rs.65 -3 to mean price 65

Required ratio = 3 : 2