Question

9. The mean of eight numbers is 27. If one more number is included, then the mean is 26.
Find the included number.​

Answer 1

Answer:

Step-by-step explanation:

Initially,

Mean of 8 numbers = 27

i.e. Total sum of 8 numbers = 27*8 = 216.

Now, After including a number,

Total sum of 9 number = 26*9 = 234.

So, Included number = 234-216 = 18.

Answer 2

sum of number in first case = 8× 27 = 216

sum of number in second case = 9×26 =234

hence the required number = 234 -216

= 18 answer