Average & Age Related Problems Test

Result

Average & Age Related Problems Test - 1

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Question 1
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A person reached Delhi from Jaipur by his car at a speed of 60 km per hour and returned to Jaipur along the same route at a speed of 40 km per hour. What is his average speed?

A
50 km per hour

B
45 km per hour

C
48 km per hour

D
55.5 km per hour

E
None of these

Solution

= 48 kmph
Question 2
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The average weight of 8 persons is increased by 2.5 kg When one of them whose weight is 56 kg is replaced by a new man. The weight of new man is:

A
66 kg.

B
75 kg.

C
67.6 kg.

D
76 kg.

E
None of these

Solution

Weight of new man = 56+8×2.5 kg

= (56+20)kg = 76
Question 3
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The average of consecutive natural numbers from1 to 49 is :

A
28

B
50

C
48

D
49

E
None of these

Solution
Question 4
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Raju's average daily expenditure is ₹15 during September, ₹20 during October and ₹13 during November. What is the average daily expenditure for the three months?

A
₹16 approximately

B
₹18 approximately

C
₹19.50 approximately

D
₹17 approximately

E
None of these

Solution

Average daily expenditure
Question 5
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The average of first five multiples of 3 is :

A
15

B
9

C
12

D
3

E
None of these

Solution
Question 6
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If difference between age of Ritu and Ram is 15 years and ratio of their ages is 3:2, then the age of Ram is:

A
25 years

B
20 years

C
28 years

D
30 years

E
None of these

Solution
Question 7
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The sum of the ages of husband and wife is 70 years and ratio of their ages is 3:2. The age of the wife is :

A
32 years

B
25 years

C
28 years

D
27 years

E
None of these

Solution

= 28 Years
Question 8
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The average score of a cricket for 10 matches is 49.9 runs. If the average for the first six matches is 49, then what is average score for the last 4 matches?

A
48.7

B
49.8

C
46.4

D
50

E
None of these

Solution
Question 9
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The present age difference between father and son is 14 years. The ratio of their age will be 4: 3 after 11 years. How old is son now?

A
25 years

B
31 years

C
30 years

D
28 years

E
None of these

Solution

= 28 Years