Question

The average of P, Q, and R is 10, and the value of Q is 7. What is the sum of  P and R?
1. 23
2. 21
3. 20
4. 24

Answer 1

Correct Answer - Option 1 : 23

Given:

(P + Q + R)'s average = 10 

Q = 7

Formula used:

Average = sum of observations/total number of observations

Calculation:

(P + Q + R)/3 = 10

⇒ P + 7 + R = 30

⇒ P + R = 23

∴ The answer is 23.