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There are **15** NRICH Mathematical resources connected to **Equally likely outcomes**, you may find related items under Probability.

Problem
Primary curriculum
Secondary curriculum
### Which Spinners?

Can you work out which spinners were used to generate the frequency charts?

Age 14 to 18

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Connect Three

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

Age 11 to 16

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Cosy Corner

Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Two's Company

Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Flippin' Discs

Discs are flipped in the air. You win if all the faces show the same colour. What is the probability of winning?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Teams

Two brothers belong to a club with 10 members. Four are selected for a match. Find the probability that both brothers are selected.

Age 16 to 18

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### What do you know about Probability? (2)

What are the likelihoods of different events when you roll a dice?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### What Do You Know about Probability? (1)

What is special about dice?

How can we use dice to explore probability?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Dicey Dice

Invent a set of three dice where each one is better than one of the others?

Age 16 to 18

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Misunderstanding Randomness

Which of these ideas about randomness are actually correct?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Can't Find a Coin?

Can you generate a set of random results? Can you fool the random simulator?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### How Many Balls?

A bag contains red and blue balls. You are told the probabilities of drawing certain combinations of balls. Find how many red and how many blue balls there are in the bag.

Age 16 to 18

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Master Minding

Your partner chooses two beads and places them side by side behind a screen. What is the minimum number of guesses you would need to be sure of guessing the two beads and their positions?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Coin Tossing Games

You and I play a game involving successive throws of a fair coin. Suppose I pick HH and you pick TH. The coin is thrown repeatedly until we see either two heads in a row (I win) or a tail followed by a head (you win). What is the probability that you win?

Age 14 to 16

Challenge Level