Find the average of five numbers a, b, c, d and e such that b = 20, and a is 20% more than that of ‘b’. ‘c’ is 10 less than ‘a’. The ratio of ‘c’ to ‘d’ is 1:3, respectively, and ‘e’ is 5 less than ‘b’.

According to the question,

a = 1.20 × 20 = 24

c = 24 – 10 = 14

d = 14 × 3 = 42

e = 20 – 5 = 15

Required average = (24 + 14 + 42 + 15 + 20)/5 = 115/5 = 23

- The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age of A.
- The average age of three children is 32 years. If their ages are in the ratio 3:6:7. Find the age of the youngest child.
- In an Aerobic class, the average age of all the members was 54.5 years, 11 members left the class and 7 new members joined. If the average age increased by 3 years and the total age decreased by 140, what was the number of members in the class initially?
- The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 runs, If these two innings are excluded, the average of the remaining 38 innings is 48 runs. The highest score of the player is
- The average of 15 numbers is 110. The average of the first 7 numbers is 98 and the average of the last 7 numbers is 62. What is the 8
^{th}number? - In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced to 60 from 75 and the overall average of the student is reduced to 70. Then find the total number of students who participated in that examination.
- In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced to 60 from 75 and the overall average of the student is reduced to 70. Then find the total number of students who participated in that examination.
- There are two sections A and B of a class, consisting of 38 and 42 students, respectively. If the average weight of the students of section A is 55 kg and that of section B is 32 kg, find the average weight of all the students in the class.
- The average weight of 12 players in a team is increased by 1/3 kg, when one of the players whose weight is 55 kg is replaced by another player. What is the weight of the new player?
- Average 20 numbers is ‘x’. If the average of first 12 numbers is 64.5 while average of last 5 numbers is 84.8 and 13
^{th}, 14^{th}and 15^{th}numbers are (3x - 49), (x + 52) and 183 respectively. Find the 14^{th}number.

More Average Questions

×