The sum of five numbers is 800.
The sum of five numbers is 800. The average of the first two numbers is 100 and the third number is 150. Find the average of the two numbers?
Answer/Solution
225
Steps/Work
Let the five numbers be P, Q, R, S and T.
=> P + Q + R + S + T = 800
(P + Q)/2 = 100 and R = 150
P + Q = 200 and R = 150
P + Q + R = 350
S + T = 800 - (P + Q + R) = 450
Average of the last two numbers
= (S + T)/2 = 225
Answer:A
=> P + Q + R + S + T = 800
(P + Q)/2 = 100 and R = 150
P + Q = 200 and R = 150
P + Q + R = 350
S + T = 800 - (P + Q + R) = 450
Average of the last two numbers
= (S + T)/2 = 225
Answer:A