Binomial Probability

If you were to flip a coin 20 times, what is the probability you would get at least 13 heads?

• .9423
• .1316
• .0577
• .0739

If you were to flip a coin 20 times, what is the probability you would get at most 13 heads?

• .9423
• .1316
• .0577
• .0739

If you were to flip a coin 20 times, what is the probability you would get exactly 10 heads?

• .5
• .1762
• .5881
• .4119

If you were to flip a coin 20 times, what is the probability you would less than 40% resulting in heads?

• .1316
• .8684
• .2517
• .7483

If you were to flip a coin 20 times, what is the probability you would get either 10 or 11 heads?

• .8398
• .1602
• .3364
• .6636

Suppose you roll a fair die. You earn 30 points for an even number, 20 points for rolling 5 and 10 points for anything else.

What is the probability you earn at least 20 points?

• 5/6

• 1/6

• 1/3

• 2/3

You are playing for the juniors in the Powder Puff football game. As a quarterback, you typically complete 3% of your passes. If you make 25 passes in the game, what is the probability that you will complete at least 3?

• 0.04

• 0.96

• 0.01

• 0.99

You are a terrible driver. Whenever you drive, there is a 70% chance that you will run over a pedestrian. If you go for a drive 15 times, what is the probability that you will run over 7 or more pedestrians?

• 0.98
• 0.02
• 0.95
• 0.05

It has been estimated that about 30% of frozen chicken contain enough salmonella bacteria to cause illness if improperly cooked. A consumer purchases 12 frozen chickens. What is the probability that the consumer will have more than 6 contaminated chickens? 

• .961
• .118
• .882
• .039

The probability that a certain machine will produce a defective item is 1/4. If a random sample of 6 items is taken from the output of this machine, what is the probability that there will be 5 or more defectives in the sample?

• 19/4096
• 18/4096
• 4/4096
• 3/4096