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**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.

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.

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]**