The 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
3
Answer:
the excluded number is 8
Step-by-step explanation:
mean = 20
No. of numbers = 5
sum of all the no.s / 5 = 20
therefore, the sum of all no.s = 100
let the excluded no. be x, then
sum = 100 - x
new mean = 23
therefore,
100-x/4 = 23
100 - x = 92; -x = -8
therefore,
x = 8
the excluded number is 8!!
Answered by
2
Step-by-step explanation:
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