JAMB - Mathematics (1983 - No. 22)
The scores of 16 students in a Mathematics test are 65, 65, 55, 60, 60, 65, 60, 70, 75, 70, 65, 70, 60, 65, 65, 70. What is the sum of the median and modal scores?
125
130
140
150
137.5
Vysvětlení
\(\begin{array}{c|c} Scores & Frequency \\\hline 55 & 1\\ 60 & 4\\ 65 & 6\\ 70 & 4\\ 75 & 1 \end{array}\)
Median = 65(middle number)
Mode = 65(most common)
Median + Mode = 65 + 65 = 130
Median = 65(middle number)
Mode = 65(most common)
Median + Mode = 65 + 65 = 130