Average (SSC)

Total Questions: 43

31. x, y and z are three positive numbers such that y is 4/5 times of x and z is 5/8 times of y. If the average of reciprocals of the numbers x, y and z is 17/240, then the average of 3 times of x and 5 times of y will be: [SSC CHSL 10/8/2021 (Afternoon)]

Correct Answer: (a) 70

32. The numbers 2, 3, 4 and 5 occur (2 + 5k), (5k - 7) (2k - 3) and (k + 2) times, respectively. The average of the number is 2.85. Later on, the number 2 was replaced by 6 in all the places. What is the average of the new numbers? [SSC CHSL 5/8/2021 (Evening)]

Correct Answer: (b) 5.25

33. If the average of the 3-digit numbers 335, 2x5, x35, 63x and 406 is 411, then what will be the average of (x - 1), (x - 3) (x + 3) and (x + 5) ? [SSC CHSL 16/4/2021 (Afternoon)]

Correct Answer: (c) 5

34. The average of the numbers a, b, c and d is 2d + 4 Also, the averages of the numbers a and b, b and c, c and d are 8, 5 and 4, respectively. If e = a + d + 1 , then what is the average of the numbers d and e? [SSC CHSL 13/4/2021 (Evening)]

Correct Answer: (a) 8

35. The average of four consecutive odd natural numbers is eight less than the average of three consecutive even natural numbers. If the sum of these even numbers is equal to the sum of above four odd numbers, then the average of four original odd numbers is: [SSC CHSL 20/10/2020 (Afternoon)]

Correct Answer: (b) 24
Solution:

36. The average of nine 2 digit numbers is decreased by 6 when the digits of one of the 2 digit numbers is Find the difference interchanged. between the digits of that number. [SSC CHSL 20/10/2020 (Morning)]

Correct Answer: (a) 6

37. The numbers 24, 45, a, 35, 59, 83, 46, b, 29, 74 are serially numbered as they appear in the sequence. When each number is added to its serial number, then the average of the new numbers formed is 55. The average of the missing numbers (a and b) is: [SSC CHSL 13/10/2020 (Afternoon)]

Correct Answer: (d) 50

38. The average of 35 consecutive natural numbers is N. Dropping the first 10 numbers and including the next 10 numbers, the average is changed to M. If the value of M²- N² = 600, then the average of 3M and 5N is: [SSC CHSL 13/10/2020 (Morning)]

Correct Answer: (d) 115

39. A batsman in his 11ᵗʰ innings makes a score of 77 runs, thereby increasing his average scores by 3. What is his average score after the 11ᵗʰ innings? [SSC CHSL 17/03/2020 (Morning)]

Correct Answer: (c) 47

40. The average age of husband, wife and child 7 years ago was 42 years and that of wife and child 9 years ago was 36 years. The present age of the husband is: [SSC CPO 12/12/2019 (Evening)]

Correct Answer: (d) 57