You may also like

problem icon

Over-booking

The probability that a passenger books a flight and does not turn up is 0.05. For an aeroplane with 400 seats how many tickets can be sold so that only 1% of flights are over-booked?

problem icon

Statistics - Maths of Real Life

This pilot collection of resources is designed to introduce key statistical ideas and help students to deepen their understanding.

problem icon

Binomial or Not?

Are these scenarios described by the binomial distribution?

Binomial Conditions

Age 16 to 18 Challenge Level:
What does it mean for two trials to be independent?  Make sure you are absolutely clear on this before you start!

Can you come up with examples where the trials are dependent?  What do we mean by the probability of success of the second trial if it is dependent on the first trial?

You might find it helpful to think in terms of tree diagrams or two-way tables (if there are only two trials).

Bear in mind that if each trial is a repeat of the first trial with the same starting conditions, then it is likely to have the same probability of success and be independent of the first trial.  So to find an example where these conditions are not met, the trials cannot possibly all look identical.

There are some example situations that might give you some ideas in Binomial or Not?