** 9) The average monthly expenditure of a family for the first five months is Rs. 2580 and for the next 7 months is Rs. 3050. If the family saves Rs. 2470 during the whole year, find the average monthly salary of the family during the year.**

(A) Rs. 2490

(B) Rs. 3060

(C) Rs. 3200

(D) Rs. 3080

** 10) Nine students of a class contribute a certain sum. Seven of them give Rs. 5 each and the other two give Rs. 5 and Rs. 9 more than the average contribution of all the 9 students. The average contribution of the class of 9 students is:**

(A) Rs. 10

(B) Rs. 14

(C) Rs. 7

(D) Rs. 12

** 11) A batsman has a certain average of runs for 11 innings. In the 12th inning he scores 129 runs, thereby increasing his average by 9 runs. What is his average for the first 11 innings?**

(A) 30

(B) 45

(C) 11

(D) 21

** 12) A batsman's average for a certain number of innings was 42.5, In the next four innings he scored 20, 75, 15, and 0 runs and his average for all the innings was fall by 5. How many innings did he played?**

(A) 9

(B) 8

(C) 12

(D) 11

** 13) The average weight of 24 students of section A of class is 58.6kg whereas the average weight of 26 students of section B of the same class is 60.4kg. Find the average weight of students of both section.**

(A) 59.53

(B) 57.53

(C) 56.53

(D) 49.33

** 14) The average of 11 numbers is 42. On including the twelfth number the average becomes 45. The twelfth number is?**

(A) 78

(B) 72

(C) 68

(D) 52

** 15) The average of 5 numbers is 80. If one number is removed, the average becomes 50. Find the removed number.**

(A) 40

(B) 70

(C) 150

(D) 200

** 16) If the average of 5 quantities is 8 and the average of 3 of them is 6. What is the average of the remaining two numbers?**

(A) 7

(B) 10

(C) 11

(D) 13