Mathematics (AS & A Level) · Oct / Nov 2021 · Paper 53 · Question 7
9709
As printed in the paper
The question as text
Box A contains 6 red balls and 4 blue balls. Box B contains x red balls and 9 blue balls. A ball is chosen at random from box A and placed in box B. A ball is then chosen at random from box B.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
7(a)[3]
7(b)[2]
7(c)[5]
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