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Learn POLICE SI MCQs with answers [Page 8 of Department 132]

Vaibhav Shukla • 4.53K Points
Extraordinary

71) The average age of 14 girls and their teacher’s age is 15 years. If the teacher’s age is excluded, the average reduces by 1. What is the teacher’s age?

(A) 32 years

(B) 35 years

(D) 29 years

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Correct Answer - Option (D)

Explanation :
According to question , Total age of 14 girls + 1 teacher = 15 × 15 = 225 yrs. Average age of 14 girls = 14 yrs. ∴ Total age of 14 girls = 14 × 14 = 196 yrs. ∴ Teacher’s age = 225 – 196 = 29 yrs.

Vaibhav Shukla • 4.53K Points
Extraordinary

72) The average of marks of 28 students in Mathematics was 50; 8 students left the school, then this average increased by 5. What is the average of marks obtained by the students who left the school ?

(A) 37.5

(B) 50.5

(D) 42.5

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Correct Answer - Option (A)

Explanation :
The average of marks of 28 students in Mathematics = 50 Total marks of 28 students = 28 × 50 = 1400 When 8 students left , The average of marks of 20 students = 55 Total marks of 20 students = 20 × 55 = 1100 ∴ Total marks of 8 students = 1400 – 1100 = 300 ∴ Average = 300 ÷ 8 = 37.5

Vaibhav Shukla • 4.53K Points
Extraordinary

73) The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is

(A) 25

(B) 27

(D) 30

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Correct Answer - Option (C)

Explanation :
Given that , The average of five numbers = 27 Total sum of five numbers = 27 × 5 = 135 If one number is excluded, the average of five numbers = 25 Total sum of four numbers = 25 × 4 = 100 ∴ Required number = 135 – 100 = 35

Vaibhav Shukla • 4.53K Points
Extraordinary

74) A batsman has a certain average of runs for 12 innings. In the 13th innings he scores 96 runs thereby increasing his average by 5 runs. What will be his average after 13th innings?

(A) 28

(B) 32

(D) 42

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Correct Answer - Option (C)

Explanation :
Let the average for first 12 innings is y According to question , ⇒ 12y + 96 = (y + 5) x 13 ⇒ 13y - 12y = 96 - 65 ⇒ y = 31 ∴ Average after 13th inning = (31 + 5)= 36

Vaibhav Shukla • 4.53K Points
Extraordinary

75) Average runs scored by 11 players of a cricket team is 23. If the first player scored 113 runs. Find the average runs of the remaining players.

(A) 8 runs

(B) 12 runs

(D) 27 runs

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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

Vaibhav Shukla • 4.53K Points
Extraordinary

76) In a family of 5 members, the average age at present is 33 years. The youngest member is 9 years old. The average age of the family just before the birth of the youngest member was

(A) 29 years

(B) 30 years

(D) 24 years

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Correct Answer - Option (B)

Explanation :
Here , Age of the youngest member = 9 years In a family of 5 members, the average age at present = 33 years. Sum of the present age of family members = 33 × 5 = 165 years 9 years ago, Sum of their age = 165 – 9 × 5 = 120 years ∴ Required average age = 120 ÷ 4 = 30 years

Vaibhav Shukla • 4.53K Points
Extraordinary

77) The average age of four boys A, B, C and D is 5 years and the average age of A, B, D, E is 6 years. C is 8 years old. The age of E is (in years)

(A) 12

(B) 13

(D) 15

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Correct Answer - Option (A)

Explanation :
Given that , The average age of A, B, D, E = 6 years. Age of C = 8 years The average age of four boys A, B, C and D = 5 years ⇒ A + B + C + D = 20 years ⇒ A + B + D = 20 – 8 = 12 years ∴ The average age of A, B, D, E = 6 years. Now, A + B + D + E = 24 years ∴ E = 24 – 12 = 12 years

Siddharth M • 1.75K Points
Master

78) "Taxes on lands and buildings" is listed in the ______ list given in the Seventh Schedule in the Constitution of India.

(A) Union

(B) Global

(D) Concurrent

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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

Siddharth M • 1.75K Points
Master

79) Who proposed the Preamble before the drafting committe of the Constitution?

(A) Jawaharlal Nehru

(B) B.R. Ambedkar

(D) Mahatma Gandhi

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Correct Answer - Option (A)

No Explanation found. Add Explanation and get +2 points.

Siddharth M • 1.75K Points
Master

80) When was the right to property removed from the list of fundamental rights?

(A) 1975

(B) 1980

(D) 1977

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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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