In a colony in Nagpur, the mean monthly electricity bill of 25 houses is ₹600. The mean bill of 10 of these houses is ₹720. Find the mean bill of the remaining 15 houses.

Question

Accepted Answer

₹520. Total of 25 = 600 x 25 = 15000. Total of 10 = 720 x 10 = 7200. Remaining 15 total = 15000 - 7200 = 7800. Mean = 7800 / 15 = ₹520.

In a colony in Nagpur, the mean monthly electricity bill of 25 houses is ₹600.
The mean bill of 10 of these houses is ₹720.
Find the mean bill of the remaining 15 houses.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Arithmetic Mean practice

In a colony in Nagpur, the mean monthly electricity bill of 25 houses is ₹600.The mean bill of 10 of these houses is ₹720.Find the mean bill of the remaining 15 houses.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Arithmetic Mean practice

In a colony in Nagpur, the mean monthly electricity bill of 25 houses is ₹600.
The mean bill of 10 of these houses is ₹720.
Find the mean bill of the remaining 15 houses.