the mean of five numbers is 7 After adding one more number the mean still remains 7 what is the new number
anmol3322:
but this is not
Answers
Answered by
10
Mean =X = 27
No of observations = 7
Sum of observations = = 27 x 7 = 189
Let the included number be x
New Mean X' = 28
New number of observations = 8
New sum of observations = 28 x 8
= 224 which is equal to 189+x
Thus x= 224-189 = 35
No of observations = 7
Sum of observations = = 27 x 7 = 189
Let the included number be x
New Mean X' = 28
New number of observations = 8
New sum of observations = 28 x 8
= 224 which is equal to 189+x
Thus x= 224-189 = 35
Answered by
25
Let the numbers be a,b,c,d,e
let new number is x
new number is 7
let new number is x
new number is 7
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