Mathematics (AS & A Level) · May / June 2019 · Paper 63 · Question 2
9709
As printed in the paper
The question as text
Megan sends messages to her friends in one of 3 different ways: text, email or social media. For each message, the probability that she uses text is 0.3 and the probability that she uses email is 0.2. She receives an immediate reply from a text message with probability 0.4, from an email with probability 0.15 and from social media with probability 0.6.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2(i)[2]
2(ii)[4]
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