Average Set 1

1.The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

   
     A.  0                                      B. 1

    C.  10                                     D. 19

2. The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4 ?
 
       A.  76                                          B. 79

       C.  85                                         D. 87

3. The average of the first five multiples of 9 is:
      A.  20                                           B. 28

       C.  30                                           D. 27

4.  There are two sections A and B of a class, consisting of 36 and 44 students’ respectively.

If the average weight of section A is 40kg and that of section B is 35kg, find the average weight of the whole class.

       A.  37.25 kg                                              B. 30.0 kg

       C.  42.50 kg                                              D. 35.0 kg

5.   The average of first ten prime numbers which are odd is?

       

        A.  17                                                 B. 15.8

         C.  13.8                                              D. 12.9

6. 

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?

   

          A. Rs 6991                                            B. Rs 5991

         C. Rs 6001                                             D. Rs  4991

7.    The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

      A. 85                                              B. 70

      C.  80                                              D. 75

8. The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining numbers is nearly:


        A. 29.68                                                B. 28.32

        C.  28.78                                               D. 29.27

9.The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest boy?
     A. 9                                                B. 15

     C.  21                                               D. 18
10. A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points, the team scored was :

     A   665                                            B 658
      
 C.  655                                                   D. 697