Question

average marks of 20 students are 85. A figure is only counted 27. In the case of 72 find out correct mean

Answer 1

Here is your answer buddy hope it helps

Answer 2

Step-by-step explanation:

initial sum = 85*20

= 1700

due to the error.....their is a reduction of 45..... (72-27) in the initial sum.

so adding this 45 with 1700... we will get the true sum.

= 1745

to find the new average = 1745/20

=87.25