Question

The mean of certain no. Of items is 62. If an observation 97 is added to the data mean becomes 67. Find bo. Of items in original data

Answer 1

Answer: 6

Step-by-step explanation:

Let original no. of items be x

sum = mean * no. = 62 * x

New sum = (62*x + 97 ) = 67(x + 1)

=> 97 - 67 = 5x

=> x = 6