Probability Review

A multiple choice question on a stats quiz has possible correct answers of a, b, c, d, e. What is the probability that "false" is the correct answer?

• .2
• 2%
• 0
• 1

A weather reporter stated that there are 3 chances in 10 of rain today. What is the probability of no rain today?

• .3
• 3%
• 50%
• .7

If a day of the week is selected, what is the probability that it is a day containing the letter y?

• 0
• 1%
• 1
• .1

Based on a Harris poll, 20% of adults smoke. If two adults are randomly selected, what is the chance that they both smoke?

• .04
• 40%
• .025
• .4

Estimate the probability that a randomly selected prime-time television show will be interrupted with a news bulletin.

• .1
• .0001
• 1%
• .5

If 1 of the 839 challenges is randomly selected, find the probability of getting a challenge that was rejected.

• 713/839
• 512/839
• 126/839
• 327/839

If 1 of the 839 challenges is randomly selected, find the probability of getting a challenge that was made by a male player or was rejected.

• .850
• .610
• .150
• .360

Find the probability of randomly selecting 1 of the 839 challenges and getting a challenge that was accepted and was made by a female player.

• 512/839
• 713/839
• 126/350
• 126/839

Find the probability of randomly selecting 2 different challenges and finding that they were both accepted challenges made by female players.

• .0222
• .0224
• .0226
• .0228

I put 25 songs on my playlist and hit "shuffle." How many ways can my ipod present the songs?

• 600
• 1.551121E25
• 300
• 7.7556E24