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
View
the Solutions here
