passpadi

2007

Mathematics

JAMB

If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and 1 respectively. Find the product of the modal and the median number

A.

36

B.

48

C.

30

D.

40

Correct Answer: 36

Explanation

Arrange in ascending order 2, 5, 5, 6, 6, ,6, 6, 8, 8 Position of median = N/2 = 8/2 = 4th and 5th ∴Median = (6+6) / 2 = 12/2 = 6 Mode the item that repeat itself most = 6 ∴Product of modal and median number = 6 x 6 = 36

Arrange in ascending order 2, 5, 5, 6, 6, ,6, 6, 8, 8 Position of median = N/2 = 8/2 = 4th and 5th ∴Median = (6+6) / 2 = 12/2 = 6 Mode the item that repeat itself most = 6 ∴Product of modal and median number = 6 x 6 = 36
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