GCE Mathematics 1990 Question 48

Question 48

Measures of Central Tendency

The table shows the amount of money (in naira) collected through voluntary donations in a secondary school.
Amount (in naira): 3, 6, 9, 12, 15, 18
No. of Students: 3, 9, 6, 15, 3, 12
Find the median of distribution

  1. A.N3.00
  2. B.N9.00
  3. C.N12.00
  4. D.N15.00
  5. E.N18.00
Show the answer and explanation

Answer: C (N12.00)

Explanation

There are 48 students, so the median is between the 24th and 25th. Cumulative frequencies are 3, 12, 18, 33, … so both lie in the N12 group.