In what ratio must a shopkeeper mix two kinds of rice ₹80 per kg and ₹120 per kg respectively so as to get a mixture at ₹100 per kg?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 1 : 1
$\text{Prices: } 80,\; 120,\; \text{Mean} = 100$
$\text{Ratio} = (120 - 100) : (100 - 80)$
$= 20 : 20 = 1 : 1$
The required ratio is $1 : 1$.