Question

A paint company asked a group of students about their favourite colours and made a pie chart of their findings. Use the information to answer the following questions.

How many students were asked about their favourite colours?

Answer 1

Class Intervals	Tally Marks	Frequency
150 − 200	II	2
200 − 250	III	3
250 − 300	IIII I	6
300 − 350	IIII	5
350 − 400	IIII II	7
400 − 450	IIII	4
450 − 500	III	3
Total		30

Total percentage of students = 100%

∴ 50 students = 100% – (30% + 20% + 25% + 15%)

= 100% – 90%

50 students = 10%

10% of total students = 50

∴ `10/100` (Total students) = 50

Total students = `(50 xx 100)/10` = 500

Total students = 500.

Total number of students = 500

500 students were asked about their favourite colours.