Question : The average of numbers A and B is 16. The average of numbers B and C is 40, What is the difference between C and A?
Option 1: 48
Option 2: 12
Option 3: 80
Option 4: 66
Correct Answer: 48
Solution :
Given: The average of numbers A and B is 16. The average of numbers B and C is 40.
The sum of the numbers A and B, (A + B) = 16 × 2 = 32
The sum of the numbers B and C, (B + C) = 40 × 2 = 80
Now, (B + C) – (A + B) = 80 – 32
⇒ C – A = 48
So, the difference between C and A = 48
Hence, the correct answer is 48.
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