Mathematics (AS & A Level) · May / June 2025 · Paper 55 · Question 4
9709
As printed in the paper
The question as text
Students applying to Drydale College take an entrance test. A student is either accepted or rejected or required to take another test with probabilities 0.3, 0.2 and 0.5 respectively. When a student takes a second test the outcomes and probabilities are exactly the same as for the first test. A student who has to take a third test is accepted with probability 0.25 and rejected with probability 0.75.
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Show the answer and mark scheme
4(a)[2]
4(b)[2]
4(c)[3]
4(d)[2]
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