There are 15 girls and 3 boys in a dance class. is he leader is chosen at random what is the probability that a boy is chosen? a) 4/7b) 1/12c) 5/6d) 1/6e) 1/3

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?