JAMB 1986 · UME · Q45

Statistics: data & averages

Of 900 students admitted to a university in 1979, the distribution by state was: Anambra 185, Imo 135, Kaduna 90, Kwara 110, Ondo 155, Oyo 225. In a pie chart of this distribution, the angle at the centre for Anambra is

Worked solution (try it first)

The total is 900 students, so each student gets $\frac{360^\circ}{900} = 0.4^\circ$ .
Anambra has 185 students: $185 \times 0.4^\circ = 74^\circ$ , option C.

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