SSC CGL/CHSL 2015:- MATHS

AVERAGE

1.Ramesh obtain 76,65,82,67 and 85 marks (out of 100)in English Mathematics ,Physics ,Chemistry and Biology .What are his average marks?
A. 65
B. 69
C. 72
D. 75

2.In Rahul opinion’s ,his weight is greater than 65 kg but less than 72 kg .His brother does not agree with Rahul and he thinks that RAhul’s weight is greater than 60 kg but less than 70 kg .His mother’s view is that his weight cannot be greater than 68 kg .If all of them are correct in their estimation ,what is the average of different probable weights of Rahul?
A. 68 kg
B. 66 kg
C. 69 kg
D. None of these

3.If the means of 5 observations x,x+2,x+4,x+6 and x+8 is 11 ,then the mean of the last three observations is :
A. 17
B. 15
C. 13
D. 11

4.The average of 1st five multiple of 3 is :
A. 15
B. 3
C. 12
D. 9

5.The average of the two digit number,which remain the same when the digits interchange their position ,is:
A. 66
B. 22
C. 55
D. 33

6.The average of 7 consecutive odd numbers is 20.The largest of these numbers is:
A. 24
B. 23
C. 22
D. 26

7.The average of five consecutive odd number is 61.What is the difference between the highest and lowest number ?
A. 4
B. 5
D. 8
E. None of these

8.The sum of three consecutive odd numbers is 38 more than the average of these numbers .What is the first of these numbers?
A. 17
B. 19
C. 13
D. None of these

9.The average age of 35 students in a class is 16 years .The average age of 21 students is 14. What is the average age of remaining 14 students?
A. 17 years
B. 18 years
C. 19 years
D. 15 years

10.The average of six numbers is 3.95.The average of two of them is 3.4 ,while the average of the other is two is 3.85.What is the average of the remaining two numbers?
A. 4.8
B. 4.6
C. 4.5
D. 4.7

11.The marks obtained by a student in five subjects are 68,73,62,85 and 79. Find the average score.
A. 73
B. 73.4
C. 75
D. 74.5

12.The average income of a group of 9 workers is Rs. 137.30 and that of another group of 7 workers is Rs. 95.06. The average income of all the persons is:
A. Rs. 118.82
B. Rs. 116.18
C. Rs. 125.18
D. Rs.128.15

13.There are 40 boys in a class. One boy weighing 40 kg goes away, and at the same time another boy joins the class. If the average weight of the class is thus increased by 100 gm, the weight of the new boy is.
A. 39.9 kg
B. 44.1 kg
C. 40.1 kg
D. 44 kg

14.My average expenses for 4 days is Rs. 6.00. I spend Rs. 7.70 on first day and Rs 6.30 on second day. If I spent Rs. 10 on third day, what did I spend on the 4th day?
A. Rs. 2/-
B. Rs. 3/-
C. Rs. 4/-
D. Nothing

15.The average temperature on Tuesday, Wednesday and Thursday was 37° centigrade. The average temperature on Wednesday, Thursday and Friday was 38° centigrade. If the temperature on Friday was 39° centigrade, the temperature on Tuesday was:
A. 35° C
B. 36° C
C. 37° C
D. 38° C

16.The average age of students in two classes of 40 students each is 10 years and 8 years respectively. The average age of students in both the classes taken together is:
A. 8 years
B. 9 years
C. 10 years
D. 11 years

17.The average age of 50 soldiers in troop is 25 years. If the captain’s age is included, the average age of all of them still remains the same. What is the captain’s age in years?
A. 25
B. More than 25
C. Less than 25
D. Cannot be determined

18.Two towns A and B are some distance apart. A girl cycles from A to B at a speed of 10 km/hr and then back from B to A at the rate of 15 km/ hr. The average speed during the journey is:
A. 12.5 km/hr
B. 15 km/hr
C. 12 km/hr
D. 13.5 km/hr

19.An employee’s average contribution to his provident fund for the first 9 months was Rs. 3,500 each and for each of the remaining 3 months, the contribution was Rs. 5,500. By what amount was his total contribution short of Rs. 58,000?
A. Rs.4,000
B. Rs.16,500
C. Rs.8,000
D. Rs.10,000

20.The average marks of 12 students was calculated as 40. But it was later found that marks of one student had been entered wrongly as 42 instead of 54 and of another as 74 instead of 50. The correct average is:
A. 39
B. 40
C. 41
D. 43

ANSWER

1. A

2. E

3. C

4. D

5. C

6. B

7. D

8. A

9. C

10. B

11. B

12. A

13. D

14. D

15. B

16. B

17. A

18. C

19. D

20. A