Page 92 - New Medley 5 Semester 2

EXERCISE 1.3

A. Find the average of each of the following:

1. First six even numbers 2. First four odd numbers

3. First 8 composite numbers 4. First five prime numbers

5. All factors of 20 6. First 7 multiples of 9

B. 1. The weights of 10 children are given below:

35 kg, 28 kg, 40 kg, 32 kg, 40 kg, 38 kg, 35 kg, 42 kg, 48 kg, 36 kg

Find the average weight of them.

2. The rainfall in a city during a week was recorded as follows:

Days Monday Tuesday Wednesday Thursday Friday Saturday Sunday

Rainfall
20 14 18 20 20 27 14
(in mm)
Find the average rainfall during a week.

3. The sum of maximum temperatures for six days is 186°C. Find the
average temperature.

4. Mikki brought 18 marbles and her sister Nikki brought 26 marbles
from the market. Their mother mixed those marbles and gave them
equally. How many marbles did each sister get?

5. The average height of three girls is 150 cm. The two girls have heights
148 cm and 142 cm respectively. What is the height of the third girl?

6. The average capacity of 4 vessels is 260 mL. If one more vessel is
included, the average capacity becomes 320 mL. Find the capacity
of the included vessel.

7. A grocer bought three types of tea weighing 8 kg, 5 kg and 5 kg
respectively. Then, he packed them in three boxes of equal weight. Find

the weight of tea in each box.

THINK AND ANSWER • Logical reasoning

Kamla earns `10500 per month. Her expenses for six months are `8500, `9000,
`7200, `8300, `9700, and `9400. What is her average savings?

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