7. Jeremy designs a game for a school fair. He has two 5-sided spinners. The spinners are equally likely to land on each of their sides. On spinner has 2 red sides, 1 green side
and 2 blue sides. The other spinner has 3 red sides, 1 yellow side and 1 blue side.
UN
(a) Calculate the probability that the two spinners will land on the same colour Ju 05C-19
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pod
13
-25
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Red
Yellow
Blu
a
Green
Red
/ 3 x 3 =
? ?
Red
Red
ola
s
PSC 23
The game consists of spinning each spinner once. It costs 20p to play the game.
To win a prize both spinners must land on the same colour. The prize for a win is 50p.
100 people play the game.
(b) Work out an estimate of the profit that Jeremy should expect to make.