Question

In a group of three numbers first is double of second and half of third. The average of three numbers is 56. Find the difference between the first number and third number?

A 34 Correct Answer Incorrect Answer
B 48 Correct Answer Incorrect Answer
C 26 Correct Answer Incorrect Answer
D 38 Correct Answer Incorrect Answer
E 42 Correct Answer Incorrect Answer

Solution

Let the first number be ‘x’ Second number = x/2 Third number = 2x According to the question, (x+x/2+2x)/3 = 56 (2x+x+4x)/6 = 56 7x =56 × 6 x = 48 ∴ Required difference = 96 - 48 = 48

Practice Next
×
×