Probability

This table describes the departures of trains out of a train station for the months of March and April.

Month | Departed on time | Delayed |
---|---|---|

March | $148$148 | $38$38 |

April | $140$140 | $20$20 |

a

How many trains departed during March and April?

b

What percentage of the trains in April were delayed? Write your answer as a percentage to 1 decimal place.

c

What fraction of the total number of trains during the 2 months were ones that departed on time in March?

d

What is the probability that a train selected at random in April would have departed on time?

Give your answer as a simplified fraction.

e

What is the probability that a train selected at random from the 2 months was delayed?

Give your answer as a simplified fraction.

Easy

Approx 7 minutes

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Investigate situations that involve elements of chance: A comparing discrete theoretical distributions and experimental distributions, appreciating the role of sample size B calculating probabilities in discrete situations.

Investigate a situation involving elements of chance