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)
คำอธิบาย
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)