Question

Jay buys apples at Rs. 40, Rs. 50, and Rs. 60 per kg for three successive years. What approximately is the average cost per kg of apples if he spends Rs. 3600 each year?
1. Rs. 48.6
2. Rs. 50
3. Rs. 46.8
4. Rs. 51.6

Answer 1

Correct Answer - Option 1 : Rs. 48.6

GIVEN:

Price of apples = Rs. 40, Rs. 50, Rs .60

Expenditure each year = Rs. 3600

FORMULA USED:

Average = Sum of observations/Total number of observations

CALCULATION:

Total quantity of apples in 3 years = 3600/40 + 3600/50 + 3600/60

⇒ 90 + 72 + 60 = 222 kg

Total expenditure in 3 years = 3 × 3600 = Rs. 10800

Average cost = 10800/222 = Rs. 48.6 per kg

∴ The average cost is 48.6 per kg