Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 7

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Earn 100

The average age of a group of 10 students was 15 years. When 5 more students joined the group, the average age rose by 1 year. The average age (in years) of the new students was

50% studentsanswered this correctly

Important Questions on Average

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 8

The average weight of

8

Persons is increased by

2.5 kg

When one of them who weighs

56 kg

is replaced by a new man. The weight of the new man is

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 9

The average weight of A, B and C is

84 kg

. If D joins the group, the average weight of the group becomes

80 kg

. If another man E who weighs

3 kg

more than D replaces A, then the average of B, C, D and E becomes

79 kg

. What is the weight of A?

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UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 10

The average of 11 results is 50. If the average of first six results is 49 and that of last six is 52, find the sixth result—

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UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 11

A man drives to his office at 60 km/hr and returns home along the same route at 30 km/hr. Find the average speed.

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 12

Find the average of five consecutive even numbers

a, b, c, d

and

e

.

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 13

A man covers

\frac{1}{3}

of his journey by train at

60 km / hr

, next

\frac{1}{3}

by bus at

30 km / hr

and the rest by cycle at

10 km / hr

. Find his average speed during whole journey.

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 14

The average marks in English of a class of

24

students is

56

. If the marks of three students were misread as

44

,

45

and

61

in lieu of the actual marks

48

,

59

and

67

respectively, then what would be the correct average?

EASY

UPSC CAPF AC Paper - I

IMPORTANT

Magical Book on Quicker Maths>Chapter 16 - Average>Exercises>Q 15

A person travels from P to Q at a speed of

40 kmph

and returns to Q by increasing his speed by

50 %

. What is his average speed for both the trips?