A group of students took a test and the following frequency table shows the scores above

The mean score is

  • A 1.75
  • B 2
  • C 2.5
  • D 2.75
  • E 3
waec 1988mathematics

The correct answer is D. 2.75

Score 0 1 2 3 4 5 Total
Freq 2 3 4 2 7 2 20
\(fx\) 0 3 8 6 28 10 55
\(\bar{x} = \frac{\sum fx}{\sum f}\) = \(\frac{55}{20}\) = \(2.75\) Previous question Next question