A probability problem by Abhranil Chakrabarti
In a pizza shop, only 2 pizzas ExtraCheese and Pepperoni are available.It is known that 25% of the city population buy ExtraCheese and 20% buy Pepperoni while 8% buy both. It is also known that 30% of the people who buy ExtraCheese but not Pepperoni also buy cold drinks and 40% of the people who buy Pepperoni but not ExtraCheese buy cold drinks while 50% of those who buy both ExtraCheese and Pepperoni also buy cold drinks. What is the percentage of the city population who buy cold drinks?
Note:-People who buy both A and B are also counted among the people who buy A and the people who buy B.
The answer is 13.9.
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