The average age of 4 member of a family is 25 yr. If head of the family is included in this group then average age increase by 20%. Find out the age of the head.

45 yr
50 yr
55 yr
60 yr

Correct Answer: 50 yr

Explanation:

Total age of 4 member = 25 x 4 = 100 yr
Total age of 5 members including the head
= 5 x (25 + 25 x 20/100)
= 5 x 30 = 150 yr
∴ Age of the head = 150 - 100 = 50 yr

← Previous Question Next Question→

More Questions from Average

The average age of a committee of 11 persons increases by 2 yr when 3 men of 32 yr. 34 yr and 33 yr are replaced by 3 woman. What will be the average age of those 3 woman?
The average weight of 10 woman is incraesed by 1 kg if 2 woman of 42 kg and 38 kg are replaced by 2 men.Find the average weight of both the men?
The mean weight of 150 students in class is 60 kg. The mean weight of boys is 70 kg and that of girls is 55 kg. What is the number of boys in the class?
The average monthly income of 4 earning members of a family is ₹ 7350. One member passes away and the average monthly income become ₹ 6500. What was the monthly income of the person, who is no more?
A man divides his total route of journey into three equal parts and decide to travel the three parts with speed of 15 km/h. 10 km/h and 5 km/ h respectively. Find his average speed of during journey.
The average temperature of Delhi for four days in a particular month is 48°C. If the average temperature of second and third days 34°C and the ratio of the temperature of first and fourth days is 9 : 11 then find out the temperature of first and fourth days.
A man spends average of ₹ 1694. 70 per month for the first 7 month and ₹ 1810.50 per month for the next 5 months. His monthly salary if he saves ₹ 3084.60. during the whole year is?
In the afternoon, a student read 100 pages at the rate of 60 pages/h. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages/h . What was her average rate of reading in pages per hour?
Mr. Bundda travels in this car and covers 1/4 part of his journey with 8 km/h, 3/5 part with 6 km/h and remaining 3/20 part with a speed of 10 km/h. Find out his average speed during the whole journey.
A person covers 9 km with a speed of 3 km/h, 25 km with a speed of 5 km/h and 30 km with a speed of 10 km/h. Find out the average speed of person.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion