21 
The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of husband is?


Answer:
Option (b) 
22 
The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is?


Answer:
Option (b) 
23 
The average expenditure of a man for the first five months is Rs.1200 and for the next seven months is Rs.1300. If he saves Rs.2900 in that year, his monthly average income is?


Answer:
Option (a) 
24 
The average of 10 numbers is 43. Average of first four is 40 and last five is 47. Then 5th number is?


Answer:
Option (b) 
25 
The average of 50 numbers is 38. It was found that one number is misread as 89 instead of 39. The correct mean is?


Answer:
Option (a) 
26 
The average of six consecutive odd no is 48. Then find out largest and smallest no.


Answer:
Option (a) 
27 
The average weight of 10 persons is increased by 2.5 kg when two of them having weight 60 and 75 kg replaced by two new persons. Then what is the average weight of new persons?


Answer:
Option (c) 