### Home > MC2 > Chapter 11 > Lesson 11.2.2 > Problem 11-41

11-41.

For each of the experimental results described, write the indicated probability.

A coin is flipped

times. It lands tails times. What is P(heads)? How many times did the coin land heads out of the total 80 times?

A bag contains purple and orange marbles. Sam randomly takes out one marble then returns it to the bag. He does this

times, and of those times an orange marble is pulled out. What is P(green)? How many green marbles are there in the bag?

Sarah pulls a card from a standard deck and then replaces it. She does this

times, and of the time it is hearts. What is P(~hearts)? Recall that ~ means "not hearts." If

of the time, it is a heart, the remaining trials must not have been hearts.