WJEC GCSE Mathematics Probability overview quiz quiz

What is the range of values a probability can take?

A bag has $3$ red and $7$ green counters. What is $P(\text{red})$?

If $P(A) = 0.35$, what is $P(\text{not } A)$?

Two events are mutually exclusive. How do you find $P(A \text{ or } B)$?

Two fair six-sided dice are rolled. How many equally likely outcomes are there?

On a tree diagram, how do you combine probabilities along a single branch?

A spinner lands on red with probability $0.4$. Spun twice (independent), what is $P(\text{red, red})$?

A bag has $4$ red and $6$ blue beads. Two are drawn without replacement. What is $P(\text{red})$ on the second draw if the first was red?

In set notation, what does $A \cup B$ represent?

When filling in a Venn diagram, which region should you place first?

In a class of $30$, $18$ study French, $14$ study German and $5$ study both. How many study French only?

A biased dice lands on five $48$ times in $200$ rolls. Estimate $P(\text{five})$.

As the number of trials in an experiment increases, the relative frequency tends to do what?

The probability of an event is $0.25$. In $80$ trials, what is the expected frequency?

What does 'expected frequency' mean?

Which tool best organises the outcomes of two events happening in sequence?