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Proability

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
Reply 1
Draw a tree of the different possible events, and calculate different probabilities of each.
Reply 2
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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