JAMB - Mathematics (1995 - No. 8)
Four members of a school first eleven cricket team are also members of the first fourteen rugby team. How many boys play for at least one of the two teams?
25
21
16
3
Erläuterung
Number of people playing both rugby and cricket = 4
Number that play cricket only = 11 - 4 = 7
Number that play rugby only = 14 - 4 = 10.
Number that play for at least one of the teams = 4 + 7 + 10 = 21.