Question

the mean of 5 number is 18,if one number is excluded,then mean becomes 16.find the excluded number

Answer 1

Answer:

The required number is 26

Step-by-step explanation:

let the number be x

so, 18 = sum of 5 numbers/5

18 x 5 = sum of 5 numbers

90 = sum of 5 numbers

now,

16 = sum of 4 numbers/4

16 x 4 = sum of 4 numbers

64 = sum of 4 numbers

so,

x = 90 - 64

x = 26

Answer 2

Answer: 26

Step-by-step explanation: Mean of 5 numbers = 18

As 1 number is excluded,

So mean of 4 numbers = 16

Therefore, value of the excluded number =

( 5 x 18 ) - ( 4 x 16 )

= 90 - 64

= 26