Question

The average of 3 numbers is 21 and two of them are 18and 27 then the third number​

Answer 1

Answer:

18

Step-by-step explanation:

Average of 2 numbers= 21

given numbers = 18 and 27

let the other no. be x.

ATQ, 18+27+x/3 = 21

=> 45+x/3 = 21

=> 45+x = 21 x 3 = 63

=> x = 63-45 = 18

Therefore the third number is 18.