Question

Cost of milk goes up by ₹2 on the sixth day of the week. If the cost on Monday was ₹30, then what is the average cost of milk for 7 days?

• A. ₹30.57
• B. ₹35
• C. ₹32.5
• D. ₹28

Answer 1

The correct option is A

₹30.57

Cost of milk for the first 5 days
= ₹30 $\times$ 5 = ₹150

Cost of milk for the next 2 days
= ₹32 $\times$ 2 = ₹64

Total cost of milk for the 7 days
= ₹150 + ₹64 = ₹214

$\therefore$ Average cost of milk
= $\frac{214}{7}$
= ₹30.57