Question

V. Mean of 9 numbers is 10. If one more number is added,
the mean remains as 10. Find the number which is added..​

Answer 1

refer this picture

hope it helps

Answer 2

Dear Student,

◆ Answer -

Number which is added = 10

● Explanation -

Sum of 9 numbers is -

Sum = n × mean

Sum = 9 × 10

Sum = 90

Sum of 10 numbers is -

Sum = n × mean

Sum of 10 numbers = 10 × 10

Sum of 10 numbers = 100

So the number which is added is -

Required number = sum of 10 numbers - sum of 9 numbers

Required number = 100 - 90

Required number = 10

Hence, number which is added is 10.

Hope this helps you..