In what ratio must a shopkeeper mix two types of oranges worth ₹55 per kg and ₹70 per kg respectively so as to get a mixture at ₹65 per kg.

1 : 2

The correct answer is Option (1) → 1 : 2

To find the ratio in which the shopkeeper must mix the two types of oranges worth Rs. 55 per kg, and is 70 kg respectively.

Required ratio = $\frac{Cost\,of\,expensive-Cost\,of\,mixture}{Cost\,of\,mixture-Cost\,of\,cheaper}$

$=\frac{70-65}{65-55}=\frac{1}{2}$