Average28

Question 1

The average of A and B is 20 years. If C were to replace A, the average would be 19 and if C were to replace B, the Average would be 21. What are the ages of A, B and C ?
A. 18 years, 16 years, 20 years
B. 22 years, 18 years, 20 years
C. 21 years, 18 years, 12 years
D. 13 years, 17 years, 24 years

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Question 2

The average age of 4 member of a family is 25 yr. If head of the family is included in this group then average age increase by 20%. Find out the age of the head.

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Question 3

Average age of 5 boys is 16 yr,of which that of 4 boys is 16 yr, 3 months. The age of the 5th boys.
A. 2years
B. 11years
C. 9years
D. 15years

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Question 4

The average of four consecutive numbers A, B, C, and D is 49.5. What is the product of B and D ?
A. 2299
B. 2399
C. 2499
D. 2599

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Question 5

A sum was invested at simple interest at a certain interest for 2 years. It would have fetched Rs. 60 more had it been invested at 2% higher rate. What was the sum?
A. Rs. 1500
B. Rs. 2500
C. Rs. 1300
D. Rs. 1000

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Question 6

The average of 8 numbers is 14. The average of 6 of these numbers is 16. What is the average of the remaining two numbers?
A. 8
B. 2
C. 6
D. 9

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Question 7

5 years ago, the average of Ram and Shyam age was 20 years. now, the average age of Ram , Shyam and Mohan is 30 years . what will be Mohan’s age 10 years hence?
A. 35 years
B. 40years
C. 45years
D. 50years

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Question 8

A businessman purchased 30 TV sets in Rs. 300000, If the average cost of 15 TV sets is Rs. 9000 then find out the average cost of remaining TV sets.
A. Rs. 5500
B. Rs. 7000
C. Rs. 9000
D. Rs. 11000

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Question 9

The mean temperature of Monday to Wednesday was 37° C and of Tuesday to Thursday was 34° C . If in the temperature on Thursday was 4/5th that of Monday, what was temperature on Thursday ?
A. 32° C
B. 34° C
C. 36° C
D. 38° C

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Question 10

The mean marks obtained by seven students group is 226. If the marks obtained by six of them are 340, 180, 260, 56, 275 and 307 respectively. Find the markes obtained by the seventh student.
A. 142
B. 164
C. 178
D. 191

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Question 11

A man whose bowling average is 12.4 takes 5 wicket for 26 runs and thereby decreases his average by 0.4. The number of wickets taken by him, before his last match is ?
A. 85
B. 76
C. 56
D. 34

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Question 12

The average of 5 consecutive number is n , if the next two number are also include, the average of 7 number will ?
A. Increase by 9
B. Increase by 7
C. Increase by 4
D. Increase by 1

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Question 13

The average of 25 results is 18, that of first twelve is 14 and of last twelve is 17 . Thirteenth result is
A. 75
B. 78
C. 79
D. 82

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Question 14

. If A = x% of y and B = y% of x, then which of the following is true?

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Question 15

What percentage of numbers from 1 to 70 have 1 or 9 in the unit’s digit?
A. 1
B. 14
C. 20
D. 21

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Question 16

A fruit seller had some apples. He sells 40% apples and still has 420 apples. Originally, he had:

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Question 17

Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are:
A. 39, 30
B. 41, 32
C. 42,33
D. 43,34

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Question 18

Which of the following multipliers will cause a number to be increased by 29.7% ?
A. 1.297
B. 12.97
C. 129.7
D. 1297

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Question 19

. If 25% of a number is subtracted from a second number, the second number reduces to its five-sixth. What is the ratio of the first number to the second number ?
A. 1:3
B. 2:3
C. 3:2
D. Data inadequate

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Question 20

The difference of two numbers is 20% of the larger number. If the smaller number is 20, then the larger number is :
A. 25
B. 45
C. 50
D. 80

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