Question

The mean of 12 numbers is 56. If one number 67 is excluded from the data, what will be the mean of remaining 11 numbers​

Answer 1

Answer:

given= mean of 5 numbers is 20 if one number is excluded mean of the remaining numbers becomes 23 find the excluded number

mean of 5 numbers = 20

Sum of 5 numbers = 20×5 = 100  

if one is excluded, mean of 4 numbers = 23

Sum of 4 numbers = 23×4= 92  

The number excluded= 100 - 92 = 8