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    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
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    Draw a tree of the different possible events, and calculate different probabilities of each.
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    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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Updated: July 31, 2016
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