JAMB - Mathematics (1995 - No. 34)
The pie chart shows the distribution of students in a secondary school class. If 30 students offered French, how many offered C.R.K?
25
15
10
8
설명
Total number of students (y) using the subject French
( 90 / 360 )º x Y = 30
Y = 30 x 4
Y = 120
History- 90º + French- 90º + Economics- 150º + CRK = 360º
CRK = 360º - 330º = 30º
Number that offered CRK:
( 30 / 360 )º x 120 = 10