How is adding two negative fractions similar to adding two negative integers

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Which of the following is the true for f(x) = 5cos

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.