Question

18. Average of 6 numbers is 8. One

more number is added and the

average became 9. What was the

additional number ?

(A) 15 (B) 16

(C) 7 (D) 9​

Answer 1

Answer:

9 is a write answer for this question

Answer 2

Answer:

Let the added nunber be x.

sum of 6 observation = 8 × 6 = 48

so sum of 7 observation = 48 + x

mean of 7 observation = 9

so,

48 + x = 7 × 9

x = 63 - 48

x = 15

Step-by-step explanation:

Option (A) is correct