Question

the mean of 11 number is 5 if one more number is added to the collection the new mean of the 12 number would be 7 find the value of the 12 number​

Answer 1

Step-by-step explanation:

mean of 11 numbers = 5

sum of 11 numbers= 11 × 5 = 55

mean of 12 numbers = 7

sum of 12 numbers = 12 × 7 = 84

Excluded number = ( 84 - 55 )

= 29