JAMB - Mathematics (1989 - No. 39)
If n is the median and m is the mode of the following set of numbers, 2.4, 2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is
(2.6, 2.6)
(2.5, 2.6)
(2.6, 2.5)
(2.5, 2.1)
Wyjaśnienie
Arrange the numbers in order, 1.6, 2.1, 2.1| 2.4, 2.6| 2.6, 2.6, 3.7
n = median = \(\frac{2.4 + 2.6}{2}\)
= 2.5
m = mode = 2.6
∴ (n, m) = (2.5, 2.6)
n = median = \(\frac{2.4 + 2.6}{2}\)
= 2.5
m = mode = 2.6
∴ (n, m) = (2.5, 2.6)