There is a list of seven numbers. The average of the first four numbers is 5, and the average of the last four numbers is 8. If

Question

3 years ago

15

the average of all seven numbers is (6 + 4/7), find the number common to both sets of four numbers.

1 answer:

sammy [17] · Answer 1 · 2022-06-10T16:01:36+03:00

sammy [17]3 years ago

3 0

Answer:

6

Step-by-step explanation:

Sum of first 4 numbers= 4*5= 20

This includes 3 + 4th number

Sum of last 4 numbers= 4*8= 32

This includes 4th number + 3

Sum of 7 numbers= 7*(6+4/7)= 46

This includes 3+4th number +3

Number common to both sets= (20+32)- 46 = 6