JAMB 1987 · UME · Q47

The goals scored by 40 football teams are recorded below. What is the total number of goals scored by all the teams?

Number of goals	0	1	2	3	4	5	6
Frequency	4	3	15	16	1	0	1

Worked solution (try it first)

Each row gives goals × number of teams: $0(4) + 1(3) + 2(15) + 3(16) + 4(1) + 5(0) + 6(1)$ .
That is $0 + 3 + 30 + 48 + 4 + 0 + 6 = 91$ goals, option C.