Problem Based on Average
Q.1) The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded no. is?Ans: 35
Q.2) The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then average of the remaining is (approx.)?
Ans: 29.68
Q.3) The average of 7 consecutive numbers is 20, then largest number is?
Ans: 23
Q.4) The average of non zero number and its square is 5 times the number. The number is?
Ans: 9
Q.5) The average of 50 natural numbers is-
Ans: 25.5
Q.6) Of the 4 numbers, whose average is 60, the first is one-fourth of the sum of the last three. The first number is-
Ans: 48
Q.7) The average of score of cricketer for ten matches is 38.9 runs. If the average for the first six matches is 42, then find the average for the last four matches?
Ans: 34.25
Q.8) The average age of 36 students is 15 years. When teacher’s age is included to it, the average increased by 1.What is the teacher’s age?
Ans: 52 years
Q.9) The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 40 kg . What is the weight of new person?
Ans: 60 kg
Q.10) A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3 runs. Find his average after 17th inning.
Ans: 39