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
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
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
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 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
Average collection of April is Rs. 7973. Find the total collection of April.
Rs. 79730
Rs. 23000
Rs. 239190
Rs. 229190
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 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 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 middle number among 13 consecutive natural numbers is 31. Find the sum of the 13 numbers ?
400
401
402
403
