Question

The average of three numbers is 20. If one of those numbers is 15, what is the
average of the other two numbers?​

Answer 1

Answer:

22.5

Step-by-step explanation:

Average of three numbers=20

therefore, the numbers can be assumed to be 20, 20 and 20 since 20+20+20/3=20

If one of the numbers is 15, then one of the other 2 numbers must be 25 so that the excess five will be adjusted with 15

Therefore, 20+25/2=22.5

Answer 2

Answer:

Step-by-step explanation:

lets take missing no. as x and y

15+x+y/3=20

15+x+y=20*3

15+x+y=60

x+y=60/15

x+y=4

now there are 3 possibilties

1) x+y=0+4

2) x+y=1+3

3) x+y= 2+2