Chapter 4.2 Review

43% of marriages end in divorce. You randomly select 15 married couples. Find the probability that exactly 5 of the marriages will end in divorce.

• 0.160

• 0.015

• 0.039

• 0.333

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school. 146 students who donated blood are randomly selected. What is mean number of people who will have Type B blood?

• 12.9

• 1.697

• 10.214

• 16.06

Find the a) mean and b) standard deviation of a binomial distribution with n=50 and p=0.4 (Round to the nearest tenth)

• a) 20, b) 12

• a) 20, b) 3.5

• a) 3.5, b) 20

• a) 20, b) 4.47

An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get at least 4 questions right?

• 0.033

• 0.0376

• 0.005

• 0.250

Is this binomial experiment? Shuffle a deck of 52 cards. Turn over the top card. Put the card back in the deck, shuffle again. Repeat the process 50 times. Let X = the number of aces you observe.

• Yes
• No, the trials are not independent.
• No, there are more than 2 outcomes

Tags

CCSS.HSF-LE.A.1C