Multiple Choice Questions
Unit D3
Extending Probability
For each of these questions, choose the option that is TRUE.
1
Three fair dice are thrown and their scores added.
What is the probability of the total being 17 ?
- (A)
- (B)
- (C)
- (D)
2
On a stretch of main road there are 4 independent sets of traffic lights, each phased for 120 seconds red, 60 seconds green.
What is the probability that a motorist arriving at random will have to stop at least once?
- (A)
- (B)
- (C)
- (D)
3
In an experiment, a card is drawn from a pack of playing cards and a coin is tossed.
Find the probability of obtaining a card which is a King and a head on the coin.
- (A)
- (B)
- (C)
- (D)
4
Nine slips of paper are numbered 1 to 9. A slip is drawn at random. This is replaced before a second slip is drawn.
Find the probability that one is an odd number and the other is an even number.
- (A)
- (B)
- (C)
- (D)
Total: -
of marks