Question: suppose you do a study on the impact of chemicals...
Suppose you do a study on the impact of chemicals in drinkwater on the health of citizens in a small town of 1000 people: 490 males, 510 females; 300 younger than 20 and 100 older than 75. 400 people are working. Every person has a unique identifier, and you randomly select 3 people to be tested. Calculate the following probabilities:
a. P(all people drawn are male)
b. P(2 of the 3 drawn are male)
c. P(all 3 are older than 75)
d. P(all 3 are younger than 20)