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Averages 1/2

7. Average age of 18 men is decreased by 1 year when one man whose age is 49 years is replaced by a new man. Find age of the new man.
a. 29
b. 31
c. 33
d. 35


8. The average weight of 12 persons is 50 kg. On replacing a man whose weight is 53 kg. with a new man, new average becomes 49 kg. The weight of the new man is:
a. 35
b. 37
c. 39
d. 41


9. The average age of 12 men in a group is increased by 2 years when two men whose ages are 20 years and 22 years, are replaced by new members. What is the average age of the new men included?
a. 35
b. 33
c. 31
d. 29


10. Average age of 7 members of a family is 29 years. If present age of the youngest member is 5 years, find average age of the remaining members at the time of birth of the youngest member.
a. 24
b. 26
c. 28
d. 30


11. Average weight of 8 persons is 48 kg. If one man weighing 34 kg, is died, what is a average age of the remaining 7 persons.
a. 50
b. 52
c. 54
d. 56


12. The average expenditure of a man for 10 days is Rs. 45 per day. If his average expenditure for the first 3 days is Rs. 52 per day, find his average expenditure for the remaining 7 days.
a. 35
b. 37
c. 39
d. 42


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