Average- MCQ Questions and Answers

Read- Average: Basic Concepts, Formulas

16. The average age of the boys in a class of 20 boys is 15.6 years. What will be the average age if 5 new boys come whose average is 15.4 years?

(a) 15.56 years

(b) 15.65 years

(c) 18 years

(d) 16.56 years

17. If the weights of four rowers of a boat respectively are 70 kg, 72 kg, 73 kg and 74 kg and the average weight of the whole crew, including the coxswain, is 70 kg. Find the weight of the coxswain?

(a) 65 kg

(b) 59 kg

(c) 61 kg

(d) 58 kg

18. The average weight of 10 men is increased by 1.5 kg when one of the men who weigh 68 kg is replaced by a new man. Find the weight of the new man?

(a) 83 kg

(b) 59 kg

(c) 85 kg

(d) 91 kg

19. The average age of a group of 20 boys is increased by one year when 5 of them whose average age was 20 years are replaced by 5 new boys. The average age of newcomers is –

(a) 24 years

(b) 25 years

(c) 30 years

(d) 35 years

20. Nine men went to a hotel. Eight of them spent Rs 10 each on their meals, ninth spent Rs 4 more than the average of all of them, then the ninth man spent?

(a) Rs 14

(b) Rs 15

(c) Rs 15.50

(d) Rs 14.50