Mathematics · Oct / Nov 2021 · Paper 22 · Question 7
0580
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Katy has 5 white flowers, x red flowers and ( ) x 2 1 + yellow flowers. She picks a flower at random. The probability that it is white is 12 1 . Find the probability that it is yellow. [4]
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37 60 oe [4]
B3 for x = 18 or 37 [yellow]
or SC2 for answer 5 12
or M2 for 1 5 = oe 12 5 + + x 2 1 x +
or M1 for 5 + x + 2x + 1 oe or [total number of flowers =] 60
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