the mean of 5 numbers is 20 if one of the number is excluded mean of the remaining number becomes 23 find the excluded number
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Answered by
4
Answer:
Excluded number is 8
Step-by-step explanation:
Mean of 5 numbers is 20
Total sum of the all the numbers = 5 x 20 = 100
if one of the number is excluded mean of the remaining number becomes 23
i,e Mean of 4 numbers is 23
Total sum of 4 numbers = 4 x 23 = 92
Excluded number = Initial sum of 5 numbers - Final sum of 4 numbers
= 100-92
= 8
Excluded number is 8
Answered by
7
ANSWER...................,
The mean of 5 number = 20
The sum of 5 number = 5 × 20 = 100
If one number is excluded ,
Then mean of 4 number = 23
Sum of 4 number = 4 × 23 = 92
∴excluded number = 100 - 92 = 8
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