Question

if mean of three numbers is 17 and last two is 15. what is first number​

Answer 1

Answer:

First Number=2

because last 2 numbers sum is 15 three numbers sum is 17 ,,,,,,17-15=2

Answer 2

Answer:

=21

Step-by-step explanation:

let the first no. be x

(x+15+15)/3=17

x+30=51

x=51-30

x =21