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# Proability

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Why bother with a post grad course - waste of time? 17-10-2016
1. 30% of toy adverts are directed at adults and 70% are directed at children. The chance an adult will buy the toy on seeing the advert is 5%, while the chance children will persuade their parents to get the toy bought for them when they see the advert is 1%.
What is the chance a toy will be purchased if someone in the family sees the advert?
What percentage of toy purchases are due to adverts directed at children?

Are the answers just 5% and 1%??
This is 4 marks in a uni exam
2. Draw a tree of the different possible events, and calculate different probabilities of each.
3. Sorry for the late reply, would you be abe to explain this a bit more? I have never done this before....

(Original post by mik1a)
Draw a tree of the different possible events, and calculate different probabilities of each.

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