Interactive practice questions
On the island of Timbuktoo the probability that a set of traffic lights shows red, yellow or green is equally likely. Christa is travelling down a road where there are two sets of traffic lights.
What is the probability that both sets of traffic lights will be red?
Easy
< 1 min
Three fair coins are tossed.
Easy
1 min
A bucket contains $5$5 green buttons and $7$7 purple buttons. Two buttons are drawn in succession from the bucket. The first button is replaced before the second button is drawn.
Easy
3 min
Han plays three tennis matches. In each match he has $60%$60% chance of winning:
Medium
5 min
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