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Use an approximation to work out the probability that in $270$ days George goes swimming at least $100$ times.
Mathematics 9709 · AS & A Level · Continuous random variables
Continuous random variables — practice question
On any day, the chance that George goes swimming is $\frac{1}{3}$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Finds $np=270\times\tfrac13=90$ and $npq=270\times\tfrac13\times\tfrac23=60$” …
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