Question

the mean of 20 numbers is 25 if one of the number is excluded the mean is calculated as 24 find the excluded number​

Answer 1

Answer:

Correct option is D)

Let the excluded number be x.

Sum of 5 numbers =20×5=100

After excluding x.

Sum of 4 numbers =4×23=92

Therefore, x=100−92

⇒x=8

Answer 2

Answer:

Correct option is D)

Let the excluded number be x.

Sum of 5 numbers =20×5=100

After excluding x.

Sum of 4 numbers =4×23=92

Therefore, x=100−92

⇒x=8