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JAMB 1994 · UME · Q43

The grades A1, A2, A3, C4 and F earned by students in a course are shown in the pie chart. What percentage of the students obtained a C4 grade?

A₁ 144°A₂ 72°A₃ 64.8°C₄ 43.2°F
Worked solution (try it first)
  1. The C4 sector has angle 43.2∘43.2^\circ out of 360∘360^\circ.
  2. As a percentage: 43.2360×100=12.0\frac{43.2}{360} \times 100 = 12.0, option D.

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