Average age of 20 teachers in the school is 34 when a 55 year old teacher retired another of 35 joined, find the present average?
30
33
35
37
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 the husband is _____.
25 years
40 years
50 years
None of these
In a certain country 2400 crore kilograms of food grains are consumed a year. If the per capita consumption is 200 kilograms, find the population of the country.
11 crore
11 lakhs
12 lakhs
12 crores
The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team ?
23 years
24 years
30 years
The average weight of 8 person’s increases by 2.25 kg when a new person comes in place of one of them weighing 65 kg. What might be weight of the new person ?
86 kg
85 kg
76.5 kg
80 kg
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 be.
17 kg
20 kg
31 kg
36 kg
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 ?
Rs. 7.98
Rs. 8
Rs. 8.50
Rs. 9
The middle number among 13 consecutive natural numbers is 31. Find the sum of the 13 numbers ?
400
401
402
403
Average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ? .
0
1
10
19
The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45 .15 kg. Find the average weight of all the boys in the class.
47.55 kg
48 kg
48.55 kg
49.25 kg
