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Back to Edexcel Maths Higher June 2017 Paper 2 Home
​Q12: Question – Paper 2 – June 2017
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Content:
  • ​Probability Trees (example 2)
  • Combined Events – Probabilities

Question
12)
There are 30 students in Mr Lear’s class.
16 of the students are boys.

Two students from the class are chosen at random.

​Mr Lear draws this probability tree diagram for this information.
Picture
a) Write down one thing that is wrong with the probabilities in the probability tree diagram.
[1 mark]

Owen and Wasim play for the school football team.

The probability that Owen will score a goal in the next match is 0.4
The probability that Wasim will score a goal in the next match is 0.25

​Mr Slater says,
“The probability that both boys will score a goal in the next match is 0.4 + 0.25”

​b) Is Mr Slater right?
Give a reason for your answer.
[1 mark]
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