Problem of the Week

A new problem every Monday that challenges participants of all ages to think creatively and apply their math skills. Perfect for a weekly mental challenge.

A survey was conducted of 800 people who drink coffee in the morning at work.  Each person was asked where their first cup of coffee was brewed each morning:  at home, at the office, national coffee shop, or locally owned coffee shop.  Survey results show that 550 people said at home, 90 at the office, 90 at a national coffee shop, and 70 at a locally owed coffee shop.  What is the probability that the first 5 people surveyed all brewed their first cup at home?


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