1. Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, what will be the difference between the highest no. and the lowest one? (1)
- (1) 72
- (2) 70
- (3) 80
- (4) 75
- (5) 69
2. The avg. weight of three men A,B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B,C,D and E becomes 79 kg. What is the weight of A? (2)
- (1) 70 kg
- (2) 75 kg
- (3) 80 kg
- (4) 85 kg
- (5) None of these
3. The average of nine numbers is M and the average of three of these is P. If the average of remaining numbers is N, which of the following equation holds true? (3)
- (1) M = N + P
- (2) 2M = N + P.
- (3) 3M = 2N + P
- (4) 3M = 2P + N
- (5) None of these
4. The avg. monthly expenditure of a family was Rs. 2400 during the first three months; Rs. 2800 during the next four months and Rs. 3500 during the last 5 months of a year. If the total savings during the year were Rs. 4200, what was the one fifth of annual income? (5)
- (1) Rs. 7200
- (2) Rs. 7400
- (3) Rs. 7550
- (4) Rs. 7880
- (5) Rs. 8020
5. There was one mess for 30 boarders in a certain hostel. If the number of boarders was increased by 10, the expenses of the mess increased by Rs. 40 per month, while the average expenditure per head diminished by Rs. 2. Find the original monthly expenses. (3)
- (1) Rs. 188
- (2) Rs.250
- (3) Rs. 360
- (4) Rs. 390
- (5) Rs. 300