Problems on Averages || MSR Classes

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Hai Friends,
Welcome to  MSR Classes. In this video I am going to solve questions on Problems on Averages (Quantitative Aptitude). This video is much helpful for the aspirants who are preparing for the upcoming Railway, SSC and other competitive exams. First pause the video and try to solve on your own.

1. A batsman scores 34, 36, 38, 40, 42 in his five innings respectively. Find the average runs in the five innings.
a) 36
b) 37
c) 38
d) 39
2. The average of 10 quantities is 12. The average of 6 of them is 8. What is the average of remaining four numbers?
a) 16
b) 18
c) 14
d) 12
3. The average weight of a group of five friends is 60kg. If Ashok, whose weight is 72kg, joins them, what is the new average weight of the group?
a) 61kg
b) 61.5kg
c) 62.5kg
d) 62 kg
4. The average weight of a group of four friends is 58kg. If Suresh joins them, and the new average of the group becomes 62.3kg. What is the weight of Rakesh?
a) 69kg
b) 73kg
c) 79kg
d) 79.5kg
5. The average age of a group of six friends is 32 years. If Asgar leaves the group, because of which average age of the group drops down by 1.5 years, what is the age of Asgar?
a) 40 yrs
b) 37 yrs
c) 39.5 yrs
d) 38.5 yrs
6. The average score of seven students in a test is 82. When the score of another student is added, the average score becomes 79.5. What is the score of this student?
a) 60
b) 61
c) 62
d) 63
7. 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) 5.5
c) 7.4
d) 5
8. The number of people attending a session from Monday to Saturday are consecutive intergers in increasing order. The average number of students from Monday to Wednesday is 28. Find the average number of students from Monday to Friday.
a) 29
b) 30
c) 31
d) 32
9. The average weight of a group of 20 boys was caluculated to be 89.4kg and It was later discovered that on weight was misread as 78kg instead of the correct one of 87kg. What is the correct average weight?
a) 89.55kg
b) 89.65kg
c) 89.75kg
d) 89.85kg
10. The average of the test scores of a class of ‘m’ students is 70 and that of ‘n’ students is 91. When the scores of both the classes are combined, the average is 80. What is n/m?
a) 10/11
b) 11/10
c) 9/10
d) 10/9

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