Question

the mean of five number is 27.if one is excluded,their mean is 25.find excluded. number ​

Answer 1

Answer:

3 is the right answer..

Answer 2

Answer:

Mean = (sum of observations) / (no. of observations)

When numbers were 5,

Mean= (Sum of 5 numbers) / 5

27 = (Sum of 5 numbers) / 5

27*5 = Sum of 5 numbers

135 = Sum of 5 numbers

When 1 number excluded,

Mean = (Sum of 5 numbers - excluded number)/4

25 = 135 - excluded number / 4

100 = 135 - excluded number

Excluded number = 135 - 100 = 35

Step-by-step explanation:

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