Compound probability word problems
The question
What is the probability of getting an even number and an odd-numbered section? Give your answer in simplest form.
Someone rolled a number cube, then spun a spinner with 4 equal sections numbered 1 to 4.
× =
- Read it through. Two things happen, and both must go your way. Work out each chance on its own first.
- The first one: 3 of the 6 are what you want, so .
- The second one: . The first turn does not change it.
- For both, multiply: × = . It is smaller, because both is harder than either one.
How it works.
- 01
Read it through. Two things happen, and both must go your way. Work out each chance on its own first.
- 02
The first one: 3 of the 6 are what you want, so 3/6.
- 03
The second one: 2/4. The first turn does not change it.
- 04
For both, multiply: 3/6 × 2/4 = 1/4. It is smaller, because both is harder than either one.