The sum of three consecutive odd numbers is 38 more than the average of these numbers. What is the first of these numbers

1.  13

2.  17

3.  19

4.  Data inadequate

5.  None of these

View Answer  
5
Correct Answer :

17


Explanation :
No Explanation available for this question

If a, b, c, d, e are five consecutive odd numbers, their average is:

1.  5( a+4)

2.  abcde /5

3.  5( a + b + c + d + e)

4.  None of these

View Answer  
4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is:

1.  15 years

2.  15.5 years

3.  16 years

4.  Cannot be computed with the given information

View Answer  
4
Correct Answer :

Cannot be computed with the given information


Explanation :
No Explanation available for this question

The average annual income (in Rs.) of certain agricultural workers is S and that of other workers is T. The number of agricultural workers is 11 times that of other workers. Then the average monthly income (in Rs.) of all the workers is:

1.  S + T/2

2.  S + 11T/2

3.  1/11S + T

4.  11S + T/12

View Answer  
4
Correct Answer :

11S + T/12


Explanation :
No Explanation available for this question

A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family

1.  

2.  

3.  

4.  None of these

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

1.  250

2.  276

3.  280

4.  285

View Answer  
4
Correct Answer :

285


Explanation :
No Explanation available for this question

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of all the students is:

1.  53.33

2.  54.68

3.  55

4.  None of these

View Answer  
4
Correct Answer :

54.68


Explanation :
No Explanation available for this question

The average weight of 16 boys in a class is 50.25 kgs and that of the remaining 8 boys is 45.15 kgs. Find the average weight of all the boys in the class

1.  47.55 kgs

2.  48 kgs

3.  48.55 kgs

4.  49.25 kgs

View Answer  
4
Correct Answer :

48.55 kgs


Explanation :
No Explanation available for this question

A car owner buys petrol at Rs 7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year

1.  Rs. 7.98

2.  Rs. 8

3.  Rs. 8.50

4.  Rs. 9

View Answer  
4
Correct Answer :

Rs. 7.98


Explanation :
No Explanation available for this question

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then :

1.  x = y + z

2.  2x = y + z

3.  x = 2y + 2z

4.  none of these

View Answer  
4
Correct Answer :

2x = y + z


Explanation :
No Explanation available for this question
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