of 75 students who took a test; 10 got 70%, 15 got 60%, 20 got 50%, 30 got 40%. if a pie chart is used to show the results, which angle represents those who got 60 marks
Answers
When 10 people liked classical music, number of people surveyed is 100
So, When 1 person liked the classical music, number of people surveyed is
100
10
When 20 people like the classical music, number of people surveyed
=
100
10
×
20
=
200
(ii) Which type of music is liked by the maximum number of people?
Answer: Light music is liked by maximum number of people.
(iii) If a cassette company were to make 1000 CD’s, how many of each type would they make?
Answer: Number of CD’s for different music
Semi Classical
=
1000
×
20
%
=
200
Classical
=
1000
×
10
%
=
100
Folk
=
1000
×
30
%
=
300
Light
=
1000
×
40
%
=
400
Answer:
72°
Step-by-step explanation:
Number of students= 75
70% result = 10, 60% result = 15, 50% result = 20, 40% result = 30
=========
Full number would be equal to full dial of pie chart which is = 360°
Then each student's pie is equivalent of:
- 360°/75 = 4.8°
Number of those with 60% marks is 15 and corresponding angle is:
- 15*4.8°= 72°
Answer is 72°