Average (SSC) (Part-7)

Total Questions: 27

11. The average of 8 consecutive even numbers written in ascending order is 17. What is the average of the last three numbers, 36 and 53? [SSC CGL 17/8/2021 (Morning)]

Correct Answer: (d) 31
Solution:

12. The average of x occurring 5 times and y occurring 7 times is 37. Also, the average of x occurring 7 times and y occurring 5 times is 35. The value of y is: [SSC CGL 18/08/2021 (Morning)]

Correct Answer: (c) 42
Solution:

13. The average daily production of toys in a factory in the month of December is 512. If the average production during the first 20 days is 515 and that of the last 13 days is 510, then what is the average of production on 19 and 20 December? [SSC CGL 18/08/2021 (Evening)]

Correct Answer: (b) 529
Solution:

14. The average weight of a certain number of students in a class is 55.5 kg. If 4 students with average weight 60 kg join the class, then the average weight of all students in the class increases by 360 gm. The number of students in the class, initially, is: [SSC CGL 20/8/2021 (Evening)]

Correct Answer: (d) 46
Solution:


15. There are some children in a camp and their average weight is 40 kg. If 5 children with average weight 36 kg join the camp or if 5 children with average weight 43.2 kg leave the camp, the average weight of children in both cases is equal. How many children are there in the camp, initially? [SSC CGL 23/8/2021 (Evening)]

Correct Answer: (b) 45
Solution:

16. What is the product of the average of first ten positive odd numbers and the average of first fifteen positive even numbers? [SSC CGL 24/8/2021 (Afternoon)]

Correct Answer: (c) 160
Solution:

17. The average height of a certain number of students in a group is 155.6 cm. If 12 students having an average height of 150.5 cm join the group and 7 students having an average height of 159 cm leave the group, the average height of the students in the group will decrease by 34 mm. What is the number of students, initially, in the group? [SSC CHSL 5/8/2021 (Morning)]

Correct Answer: (d) 20
Solution:

18. The average of the squares of four consecutive odd natural numbers is 201. The average of 7 times of the largest number and 3 times of the smallest number is: [SSC CHSL 6/8/2021 (Evening)]

Correct Answer: (c) 76
Solution:

19. There are 3 groups of personnel, male, female and children. There are 20 males and the number of females and children taken together is 4 more than that of the males. The average weight of the males is 54 kg, that of females is 49 kg and that of children is 30 kg. If the average weight of the whole group is 48.25 kg, then what is the difference between the number of females and the number of children? [SSC CHSL 10/8/2021 (Morning)]

Correct Answer: (b) 10
Solution:

20. A, B and C are three positive numbers such that the average of three-fifth of A and 30% of B is 13.5 and the average of ⅜ times of B and 25% of C is 15. A is equal to ⁵⁄₁₂ times of C, then the sum of all three numbers A, B and C is: [SSC CHSL 11/8/2021 (Afternoon)]

Correct Answer: (a) 125
Solution: