MATHEMATICS · Multi-part · CBSE · Mathematics · Probability · Probability
Problem
A survey of 200 people included 90 females. It found that 60 people smoked, 40 of whom were male.
Use the given information to complete the two-way table.
Female
Male
Total
Smoker
Non-smoker
Total
(1) A person is selected at random. Find the probability that this person is: a female non-smoker
(2) A person is selected at random. Find the probability that this person is: a male given the person was a non-smoker.
(3) If two people from the survey are selected at random, calculate the probability that: both of them are non-smoking females
(4) If two people from the survey are selected at random, calculate the probability that: one is a smoker and the other is a non-smoker.