Question

The mean of five number is 27if one more number isexcluded their mean is25 find the excluded number​

Answer 1

Answer:

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Step-by-step explanation:

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 one number excluded,

Mean = (sum of 5 numbers - excluded no.)/4

25 = (135 - excluded number)/4

25*4 = 135-excluded number

100 = 135 - excluded number

Excluded number =135-100

Excluded number = 35

I hope this will help you

Answer 2

Answer:35

Step-by-step explanation:Let the five no.s be a, b, c, d and e.

It is given that mean = 27

so we can write this as,

a+b+c+d+e / 5 = 27

a+b+c+d+e = 135 (1)

I one no is excluded then,

a+b+c+d / 4 = 25

a+b+c+d = 100 (2)

On equating (1) and (2) we get,

100+e = 135

e = 135-100

e= 35