Average (SSC) (Part-2)

Total Questions: 50

41. What is the difference between the average of prime numbers between 30 and 50 and the average of multiples of 3 between 20 and 50? [SSC MTS 05/11/2024 (Afternoon)]

Correct Answer: (a) 5.3
Solution:

42. The average age of a mother and her daughter is 42 years. The ratio of their ages is 9 : 5, respectively. Find the daughter's age (in years). [SSC MTS 12/11/2024 (Afternoon)]

Correct Answer: (a) 30
Solution:

43. The average of the first, second and third observations is 39, while the average of the second, third and fourth observations is 35. If the fourth observation is 3/4 times that of the first, then the value of the fourth observation is: [SSC MTS 12/11/2024 (Afternoon)]

Correct Answer: (a) 18
Solution:

44. The average score of 30 students (boys and girls only) in a class test was 16.2 and that of 18 boys in the same test was 16. The average score of girls in the same test was: [SSC MTS 12/11/2024 (Evening)]

Correct Answer: (b) 16.5
Solution:

45. The average of 7 numbers is 55. If the first 4 numbers are 48, 62, 135 and 74, then what will be the average of the remaining numbers? [SSC MTS 13/11/2024 (Morning)]

Correct Answer: (a) 22
Solution:

46. The average age of the 28 boys in a class is 16 years and that of the 26 girls is 15 years. The approximate average age (in years) for the whole class is: [SSC MTS 13/11/2024 (Afternoon)]

Correct Answer: (c) 15½
Solution:

47. Among three numbers, the second number is half of the first number and the third number is 4 less than the second number. If the average of the first and third numbers is 16, what is the second number? [SSC MTS 14/11/2024 (Morning)]

Correct Answer: (b) 12
Solution:

48. Seven years ago, Prachi was four times as old as her daughter was at that time. Four years from now, Prachi will be two-and-a-half times as old as her daughter would then be. Find the sum of the present ages (in years) of Prachi and her daughter. [SSC CGL 09/09/2024 (2nd Shift)]

Correct Answer: (a) 69
Solution:

49. The average temperature of a city for the first sixteen days of January is 22°C, and the average temperature for the last sixteen days of the same month is 26°C. If the average temperature for the entire month is 24°C, what is the temperature on the sixteenth day? [SSC CGL 09/09/2024 (2nd Shift)]

Correct Answer: (a) 24°C
Solution:

50. The average of the squares of the first 45 natural numbers is [SSC CGL 10/09/2024 (3rd Shift)]

Correct Answer: (c) 697.67
Solution: