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Calculate the probability that Seb travels on the bus.
Mathematics 0580 · IGCSE · Conditional probability
Conditional probability — practice question
The chance that the school bus arrives late is $\frac{9}{10}$. When the school bus is late, the chance that Seb goes on the bus is $\frac{15}{16}$. When the school bus is on time, the chance that Seb goes on the bus is $\frac{3}{4}$.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The required calculation is $\frac{1}{10}\times\frac{3}{4}+\frac{9}{10}\times\frac{15}{16}$.” …
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