Homework #3

Between a z-score of .25 and the mean

Between a z-score of 1.25 and the mean

At or above a z-score of 1.25

At or below a z-score of 1.25

At or below a z-score of -1.50

At or above a z-score of -1.75

Between the z-scores of -1.50 and .50

Between the z-scores of 1.00 and .25

Between the z-scores of 1.25 and .50

10)

We release 10 balloons. There is a 70% chance they will reach New York.

Joshua Ross releases 12. What is the probability that exactly 9 balloons will

reach New York?

When people were shown pictures of Michael Jackson, 95% of them

recognized him. Find the probability that among 12 randomly selected

people, exactly 10 will recognize Michael Jackson.

12)

Jorina just learned to play basketball. On average she can land 25% of her free throws. Assume she shoots 10 free throws. Find the probability that she can land at least 1 of the 10 free throws.