# Proability Watch

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. Forget 5% and 1% (way off)... You're looking for a probability...
https://www.mathsisfun.com/data/probability.html
3. (Original post by Deannnn97)
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
Does it say how many people are in the family? And does it say how many people actually watch the advert?

If it is one child and adult and they both watch the advert, the answer to a is 6%. If it is a two parent two child family the odds double to 12%, assuming they all watch the advert.
(.7/.01) /(.3/.05)= 46.666666666

There is some working out for the second part of the question. i don't think that this is the final answer though. You will really have to do your own working out for this one!

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