Question

there are 5 numbers whose average is 20. average of first 3 number is 15 and the average of last 3 number is 24. the middle number is ​

Answer 1

Answer:

Step-by-step explanation:

Let 5 numbers be a,b,c,d,e

Average of 5 numbers is 20

a+b+c+d+e/5=20

By cross multiplcation

a+b+c+d+e=100......1

Similarly

a+b+c/3=15

a+b+c=45.......2

c+d+e/3=24

c+d+e=72........3

Adding 2,3

a+b+2c+d+e=117.....4

Subtract equation1 from 4

C=17