Question

Average age of company A is 21 years and average age of both companies A and B is 13 years. If the ratio of number of employees in company A and B is 3:4, then what is the average age of company B?

A 7 years Correct Answer Incorrect Answer
B 11 years Correct Answer Incorrect Answer
C 8 years Correct Answer Incorrect Answer
D 12 years Correct Answer Incorrect Answer

Solution

Average of Company B = (13 × 7 - 3 × 21)/4 => (91 - 63)/4 = 7 years

Practice Next
×
×