The ratio in which two varieties of flower seeds costing ₹ 50 and ₹65 per 100 grams respectively must be mixed so as to get a resulting mixture worth ₹55 per 100 grams is

2 : 1

The correct answer is Option (3) → 2 : 1

The formula for mixing two quantities,

$\frac{x}{y}=\frac{c_2-c_m}{c_m-c_1}$

$\frac{x}{y}=\frac{65-55}{55-50}=\frac{10}{5}=\frac{2}{1}$