Question

Average of 15 numbers is 68. Average of first 8 numbers is 63 and average of last 8 numbers is 70. Find out the eighth number.
a) 44
b) 49
c) 56
d) 10​

Answer 1

Shayad iska answer 49 hai I am not sure about

Answer 2

Answer:

44

Step-by-step explanation:

average of 15 numbers = 68

sum of 15 numbers = 15× 68= 1020

average of first 8 numbers is 63

sum of first 8 numbers =8×63 = 504

average of last 8 numbers = 70

sum of last 8 number = 8 ×70 =560

8th number is = ( 560 + 504) - 1020 = 44