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The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally
6
5
7
None of these.
4
Five years ago the average of the ages of A and B was 40 years and now the average of the ages of B and C is 48years.
What will be the age of the B ten years hence
55 years
Data Inadequate
58 years
NONE OF THESE
56 years
The present average age of a family of five members is 26years.
If the present age of the youngest member in the family is ten years, then what was the average age of the family at the time of the birth of the youngest member ?
(Assume no death occurred in the family since the birth of the youngest)
NONE OF THESE
16 years
14 years
18 years
20 years
In an examination a pupil's average marks were 63 perpaper.
If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination
11
8
9
10
The sum of five numbers is655.
The average of the first two numbers is 85 and the third number is125.
Find the average of the two numbers
180
170
175
190
NONE OF THESE
If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new number is
40
70
30
90
The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average
72
45
37
79
The average salary of a person for the months of January, February, March and April is Rs.8000 and that for the months February, March, April and May is Rs.8500.
If his salary for the month of May is Rs.6500, find his salary for the month of January
4500
5000
3000
2500
The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students
50
52.5
47.5
59
A batsman makes a score of 64 runs in the 16th innings and thus increased his average by 3. Find his average after the 16th inning
19
17
18
29
A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 2 chocolates and each girl received 3chocolates.
Find the respective number of boys and girls
40, 80
50, 70
70, 50
60, 60
NONE OF THESE
Rs. 6000 is lent out in twoparts.
One part is lent at 7% p.a simple interest and the other is lent at 10% p.a simpleinterest.
The total interest at the end of one year was Rs.450.
Find the ratio of the amounts lent at the lower rate and higher rate of interest
2 : 1
4 : 1
NONE OF THESE
3 : 2
5 : 1
The average of 11 results is 50, if the average of first six results is 49 and that of the last six is 52. Find the sixth result
34
56
57
46
Three years ago the average age of a family of six members was 19years.
A boy have been born, the average age of the family is the sametoday.
What is the age of the boy
2.5 years
2 years
1.5 years
1 Year
Nine men went to ahotel.
Eight of them spent Rs.3 each over their meals and the ninth spent Rs.2 more than the average expenditure of all thenine.
Determine the total money spent by them
Rs.30.25
Rs.29.25
Rs.32
Rs.35
The average temperature for Monday, Tuesday, Wednesday and Thursday was 48 degrees and for Tuesday, Wednesday, Thursday and Friday was 46degrees.
If the temperature on Monday was 42degrees.
Find the temperature on Friday
34 degrees
38 degrees
36 degrees
40 degrees
A building contractor employs 20 male, 15 female and 5 childworkers.
To a male worker he pays Rs.25 per day, to a female worker Rs.20 per day and a child worker Rs.8 perday.
The average wage per day paid by the contractor is
Rs.23
Rs.22
Rs.21
Rs.20
Visitors to show were charged Rs.15 each on the firstday.
Rs.7.50 on the second day, Rs.2.50 on the third day and total attendance on the three days were in ratio 2:5:13respectively.
The average charge per person for the whole show is
Rs.7.50
Rs.3
Rs.4.50
Rs.5.00
The average age of a husband and a wife is 23 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child
1 Year
2 years
4 years
3 Years
The average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 24years.
Find the average age of the women
18 years
36 years
30 Years
24 years
1
2
3
5
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