Question

The following table shows the information of numbers of stamps of different countries Collected by a child. Prepare a bar graph with a suitable scale
1. GERMANY = 20
2. INDIA = 50
3. JAPAN = 35
4. China = 40
5. ITALY =25​

Answer 1

Answer:

Question. 17 Monthly salary of a person is ? 15000. The central angle of the sector representing his eiqjenses on food and house rent on a pie chart is 60°. The amount he spends on food and house rent, is

(a) Rs. 5000 (b) Rs. 2500

(c) Rs. 6000 (d) Rs. 9000

Answer. (b) Central angle of the sector representing his expenses on food and house rent on a pie chart =60°

Part of the monthly salary he is expending on food and house rent = 60°360°= 16

Hence, the amount he spends on food and house rent =16 x Monthly salary

16x 15000=Rs. 2500

Question. 18 The following pie chart*gives the distribution of constituents in the human body. The central angle of the sector showing the distribution of protein and other constituents is

ncert-exemplar-problems-class-8-mathematics-data-handling-9

(a)108° (b) 54° (c)30° (d)216°

Answer. (a) Distribution of protein and other constituents in human body = 16+14 = 30%

Central angle of the sector showing the distribution of protein and other constituents

= 30100 x 360° = 108°

Question. 19 Rohan and Shalu are playing with 5 cards as shown in the given figure. What is the probability of Rohan picking a card without seeing, that has the number 2 on it?

ncert-exemplar-problems-class-8-mathematics-data-handling-10

(a)25 (b)15 (c) 35 (d)45

Answer. (a) Total number of cards = 5

Number of cards having 2 on it = 2

Probability of Rohan picking a card without seeing, that has the number 2 on it 25

ncert-exemplar-problems-class-8-mathematics-data-handling11

In questions 20 to 22, the following pie chart represents the distribution of proteins in parts of human body.

Question. 20 What is the ratio of distribution of proteins in the muscles to that of proteins in the bones?

(a) 3 : 1 (b) 1 : 2

(c) 1 : 3 (d) 2 : 1

Answer.Distribution of protein in muscles =13

Distribution of protein in bones = 16

Ratio of distribution of proteins in the muscles to that of proteins in the bones

= 13: 15 =13 x 15

= 2:1

Question. 21 What is the central angle of the sector (in the above pie chart) representing skin and bones together?

(a) 36° (b) 60° (c) 90° (d) 96°

Answer.