Question

The mean of 5 numbers is 39. If one number is excluded mean reduced by 4. Find the
excluded number.​

Answer 1

Answer:

sum of 5 numbers = 5× 39=195

sum of 4 numbers = 4× 35=140

5th Number = 195-140= 55

Answer 2

Given : The mean of 5 numbers is 39. one number is excluded, their mean is 35,

To Find : excluded number

Solution:

mean of 5 numbers is 39.

=> Sum of 5 numbers = 5x 39

=> Sum of 5 numbers = 195

Let say Number Excluded is N

then Sum of 4 Numbers = 195 - N

Mean of 4 Numbers = 35

Sum of 4 numbers = 4 x 35 = 140

Equating Both

=> 195 - N = 140

=> N = 55

Excluded number = 55

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