When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students
(a) 55
(b) 56
(c) 57
(d) 58
c
The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is
(a) 45
(b) 50
(c) 55
(d) 60
a
In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?
(a) 6.25
(b) 6.5
(c) 6.75
(d) 7
a
A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?
(a) Rs. 4991
(b) Rs. 5991
(c) Rs. 6601
(d) Rs. 6991
a
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?
(a) Rs. 9.00
(b) Rs. 8.00
(c) Rs. 8.50
(d) Rs. 7.98
d
The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :
(a) 35
(b) 36.5
(c) 40
(d) 42
b
The average age of three boys is 15 years. If their ages are in ratio 3:5:7, the age of the youngest boy is
(a) 21 years
(b) 18 years
(c) 15 years
(d) 9 years
d
The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is:
(a) 3500
(b) 4000
(c) 4050
(d) 5000
b
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:
(a) 35 years
(b) 40 years
(c) 50 years
(d) None of these
b
The average salary per head of the entire staff of an office including the officers and clerks is Rs.90. The average salary of officers is Rs.600 and that of the clerks is Rs.84. If the number of officers is 2, find the number of officers in the office?
(a) 1540
(b) 960
(c) 840
(d) 1020
d
Average age of boys in a class is 16 years and average age of girls is 15 years, what is the average age of all
(a) 15.5
(b) 15.0
(c) 16.0
(d) Data inadequate
d
Average age of 5 people is 42 years. Another group has 8 people who have average age of 81 years. When both groups are mixed what is average age of all people?
(a) 64 years
(b) 66 years
(c) 70 years
(d) 38 years
b
Average age of A and B is 30 years, that of B and C is 32 years and the average age of C and A is 34 years. The age of C is
(a) 31 years
(b) 35 years
(c) 37 years
(d) 36 years
Without considering the salary of the boss, the average salary reduces by Rs. 1000. What will be salary of boss if average salary of 11 employees and the boss is Rs. 18000?
(a) Rs. 30000
(b) Rs. 32000
(c) Rs. 29000
(c) Rs. 34000
c
Three numbers are in the ratio 4 : 5 : 6 and their average is 30 . The largest number is:
(a) 28
(b) 36
(c) 30
(d) 32
b
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