mean of 10 numbers is 55 if one number is excluded and mean become 50 find the excluded number
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124
average(mean)=sum of data/ number of data
sum of data= average x (number of data-1) y is -1 bcoz one data is excluded
Given, mean=55, No of data= 10
Now, 55x10=50(10-1) +a a is excluded data
550=450 + a
a=100
sum of data= average x (number of data-1) y is -1 bcoz one data is excluded
Given, mean=55, No of data= 10
Now, 55x10=50(10-1) +a a is excluded data
550=450 + a
a=100
Answered by
21
the excluded number is 100
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