mean of 5 numbers is 20 if one number is excluded mean of the remaining numbers becomes 23 find the excluded number
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Answered by
470
mean of 5 numbers = 20
Sum of 5 numbers = 20×5 = 100
if one is excluded, mean of 4 numbers = 23
Sum of 4 numbers = 23×4= 92
The number excluded= 100 - 92 = 8
Sum of 5 numbers = 20×5 = 100
if one is excluded, mean of 4 numbers = 23
Sum of 4 numbers = 23×4= 92
The number excluded= 100 - 92 = 8
Answered by
133
Given: The mean of 5 numbers is 20.
if one number is excluded mean of the remaining number becomes 23.
Required: The value of excluded numbers.
The total value of 5 number = 5 x 20 = 100
The sum of value of 4 nos = 4 x 23 = 92
The value of excluded no is 100 - 92 = 8
So the answer is 8!
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