The starter and exit quiz of the lesson “Problem solving with conditional probability”, from the unit “Conditional probability” (Year 11 Maths) by Oak National Academy.
Free to use. Edit it, share it and hand it out to your students.
Oak National Academy
12 questions
Mutually __________ events have no outcomes in common.
Sofia has to catch a bus and then a train to get to school. When the bus is late, Sofia is more likely to miss the train and so be late for school. Match each value to its probability.
Sofia has to catch a bus and then a train to get to school. When the bus is late, Sofia is more likely to miss the train and so be late for school. P(Sofia is late for school) = ___.
Here is a general probability tree. Which of these probabilities give the probability of the highlighted events?
One marble is taken at random from a bag of 7 purple and 5 green marbles. The marble is not replaced. A second marble is then taken. The tree diagram shows these two events. Find the value of z.
One marble is taken at random from a bag of purple and green marbles. The marble is not replaced. A second marble is then taken. The tree diagram shows the two events. Find P(both marbles are purple).
Starting with the least likely, put these probabilities in order of likelihood.
The probability of three outcomes to a trial are shown in the table. The outcomes are exhaustive and mutually exclusive. Find P(C).
Jacob and Sofia each play a tennis match. Find the probability that both Jacob and Sofia win their match.
Jacob and Sofia each play a tennis match. Find the probability that at least one of them wins their match.
A box contains green and blue marbles. Some of the marbles have swirls on them. The Venn diagram shows the number of each type. P(B) = ___. Give your answer as a decimal.
A box contains green and blue marbles. Some of the marbles have swirls on them. The Venn diagram shows the number of each type. P(S ∪ B) = ___. Give your answer as a decimal.
