The middle number among 13 consecutive natural numbers is 31. Find the sum of the 13 numbers ?
400
401
402
403
The average weight of the 35 students of the A division of class 6 is 32 kilograms. The average weight of the 40 students of B division is 36 kilograms. What is the average weight of the two division s altogether ?
34 2/15 kg
33 2/15 kg
34 1/15 kg
33 1/15 kg
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 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
25 years
30 years
John got an average of 25 coconuts from 10 coconut tree from this coconut grove. What can be the number of coconuts he got from each coconut tree ?
200
250
275
300
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
A family consists of grand parents, parents and three grand children. The average age the grand parents is 67 years, that of the parents is 35 years and that of the grand children is 6 years. What is the average age of the family ?
28 4/7 years
31 5/7 years
32 1/7 years
None of these
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
Average collection of April is Rs. 7973. Find the total collection of April.
Rs. 79730
Rs. 23000
Rs. 239190
Rs. 229190
Collection on seven days of the first week of April is Rupees 6432, 7250, 9218, 7111, 8540, 4560 and 6700. Find one day’s average.
Rs. 7973
Rs. 8000
Rs. 7111
Rs. 9218