JAMB - Mathematics (1980 - No. 20)
A set of data contains a total of 130 items which are divided into six groups for display on a pie chart. If one group contains 26 items, then the sector representing this group on the pie chart contains an angle xo at the centre of the circle where x is
36o
60o
70o
72o
75o
คำอธิบาย
\(\frac{26}{130}\) = \(\frac{x}{360}\)
130x = 26 x 360
= 9360
x = \(\frac{9360}{130}\)
= 72o
130x = 26 x 360
= 9360
x = \(\frac{9360}{130}\)
= 72o