India Exam Junction
4. Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, then difference of first and third
numbers is
12
20
24
48
Correct Answer :
24
Solution
Let the second number be x. Then, first number = 2x, third number = 4x.
⇒ 2x + x + 4x = 56 × 3
⇒ 7 x = 168
⇒ x = 24