Question

The mean of 9 item is 15. If one more item is added to this series, the mean becomes 16. Find the value of the 10th iten

Answer 1

Answer:

25

Step-by-step explanation:

Mean of 9 items= 15. Thus, sum= 9x15= 135

Mean of (9+1) items= 16. Thus, sum= 10x16= 160

Difference= 160-135= 25

Answer 2

Answer:

25

Step-by-step explanation:

9*15=135

10*16=160

subtract it...

      =160-135

      =25

the value of 10th item is 25