### There are 19 results

Broad Topics >

Probability > Combining probabilities

##### Age 11 to 14 Challenge Level:

Imagine flipping a coin a number of times. Can you work out the probability you will get a head on at least one of the flips?

##### Age 11 to 14 Challenge Level:

This article, for students and teachers, is mainly about
probability, the mathematical way of looking at random chance and
is a shorter version of Taking Chances Extended.

##### Age 14 to 16 Challenge Level:

A gambler bets half the money in his pocket on the toss of a coin,
winning an equal amount for a head and losing his money if the
result is a tail. After 2n plays he has won exactly n times. Has. . . .

##### Age 14 to 16 Challenge Level:

If everyone in your class picked a number from 1 to 225, do you
think any two people would pick the same number?

##### Age 14 to 16 Challenge Level:

A man went to Monte Carlo to try and make his fortune. Is his strategy a winning one?

##### Age 14 to 16 Short Challenge Level:

These strange dice are rolled. What is the probability that the sum obtained is an odd number?

##### Age 14 to 18

This article, for students and teachers, is mainly about probability, the mathematical way of looking at random chance.

##### Age 11 to 16 Challenge Level:

Newspapers said that eating a bacon sandwich every day raises the risk of bowel cancer by 20%. Should you be concerned?

##### Age 14 to 16 Challenge Level:

"Statins cut the risks of heart attacks and strokes by 40%"

Should the Professor take statins? Can you help him decide?

##### Age 11 to 14 Challenge Level:

Can you design a bingo board that gives you the best chance of winning?

##### Age 14 to 16 Challenge Level:

Here are two games you have to pay to play. Which is the better bet?

##### Age 14 to 16 Challenge Level:

Two bags contain different numbers of red and blue marbles. A marble is removed from one of the bags. The marble is blue. What is the probability that it was removed from bag A?

##### Age 11 to 14 Challenge Level:

The King showed the Princess a map of the maze and the Princess was
allowed to decide which room she would wait in. She was not allowed
to send a copy to her lover who would have to guess which path. . . .

##### Age 14 to 18 Challenge Level:

Some relationships are transitive, such as `if A>B and B>C
then it follows that A>C', but some are not. In a voting system,
if A beats B and B beats C should we expect A to beat C?

##### Age 7 to 16 Challenge Level:

Use this animation to experiment with lotteries. Choose how many
balls to match, how many are in the carousel, and how many draws to
make at once.

##### Age 14 to 16 Challenge Level:

You have two bags, four red balls and four white balls. You must
put all the balls in the bags although you are allowed to have one
bag empty. How should you distribute the balls between the two. . . .

##### Age 14 to 18 Challenge Level:

How can we find out answers to questions like this if people often lie?

##### Age 14 to 18 Challenge Level:

Explore the distribution of molecular masses for various hydrocarbons

##### Age 14 to 18 Challenge Level:

Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.