Let X be the event that a person chosen at random from anywhere on earth will live in Africa. What is P(X)
Continent
Africa
North
America
South
America
Asia
Europe
Oceania
0.23
Population
distribution
0.08
0.06
0.55
0.07
0.01

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.