Question

21. The average of 5 numbers is 15, if 5 is added
to each number, then what is new average ?
(a) 10
(b) 12
(c) 15
(d) 20
22. The average of n numbers is x, if 36 is subtracted
from each two numbers, then new average
becomes (x - 8). The value of n is :
(a) 6.
(b) 8
(c) 9
(d) 72
​

Answer 1

Answer:

answer is 20

Step-by-step explanation:

15 × 5 =75

5×5 = 25

75 +25 = 100

100 ÷ 5 = 20