The average of ten numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers is:

1.  7

2.  19

3.  82

4.  84

View Answer  
4
Correct Answer :

84


Explanation :
No Explanation available for this question

Average of ten positive numbers is  If each number is increased by 10% than;

1.  remains unchanged

2.  may decrease

3.  may increase

4.  is increased by 10%

View Answer  
4
Correct Answer :

is increased by 10\%


Explanation :
No Explanation available for this question

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is:

1.  35.2

2.  36.1

3.  36.5

4.  39.1

View Answer  
4
Correct Answer :

36.5


Explanation :
No Explanation available for this question

A pupil’s marks were wrongly entered as 83 instead of instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is:

1.  10

2.  20

3.  40

4.  73

View Answer  
4
Correct Answer :

40


Explanation :
No Explanation available for this question

The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is:

1.  11 years

2.  14 years

3.  15 years

4.   years

View Answer  
4
Correct Answer :

11 years


Explanation :
No Explanation available for this question

The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is:

1.  11

2.  11.3

3.  11.4

4.  11.5

View Answer  
4
Correct Answer :

11.5


Explanation :
No Explanation available for this question

The average weight of three boys A, B and C iskg, while the average weight of three boys B, D and E is 53 kg. What is the average weight of A, B, C, D and E

1.  52.4 kg

2.  53.2 kg

3.  53.8 kg

4.  Data inadequate

5.  None of these

View Answer  
5
Correct Answer :

Data inadequate


Explanation :
No Explanation available for this question

The average temperature of the town in the first four days of a month was 58 degrees. The average for the second, third, fourth and fifth days was 60 degrees. IF the temperatures of the first and fifth day were in the ratio 7 : 8, then what is the temperature on the fifth day

1.  64 degrees

2.  62 degrees

3.  56 degrees

4.  None of these

View Answer  
4
Correct Answer :

64 degrees


Explanation :
No Explanation available for this question

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:

1.  17 kg

2.  20 kg

3.  26 kg

4.  31 kg

View Answer  
4
Correct Answer :

31 kg


Explanation :
No Explanation available for this question

The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is:

1.  Rs. 3500

2.  Rs. 4000

3.  Rs. 4050

4.  Rs. 5000

View Answer  
4
Correct Answer :

Rs. 4000


Explanation :
No Explanation available for this question
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