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20 questions
How many outcomes are in the sample space for tossing one coin?
1
2
4
8
Which of the following are possible samples spaces for tossing 2 coins? (May be more than one correct answer)
{H, T, H, T}
{HH, HT, TH, TT}
{H, T}
{T, H}
{TT, HH, TH, HT}
Which one is the sample space for flipping 3 coins?
{H, T}
{H1, H2, H3, T1, T2, T3}
{HHH, TTT, HTH, THT, TTH, HHT}
{HHH, TTT, HTH, THT, TTH, HHT, HTT, THH}
Slips of paper marked with the numbers 1, 2, 3, 4, and 5 are placed in a box. After mixing, two slips are drawn. How many possible outcomes are there?
5
10
15
25
An unprepared student takes a 3-question true/false quiz in which he guesses the answers to all 3 questions. What is the probability he gets all 3 correct?
1/2
1/3
1/6
1/8
You give the answer to a probability problem as 6/5. The teacher marks it wrong. Why?
It should have been 5/6.
Its not written as a percent.
Its more than 1.
Its not written as a decimal.
Which of these cannot be considered a probability of an outcome?
1/3
-1/5
0.80
112%
1
Roll a die one time. Find P(rolling a 4).
1/4
2/3
1/6
1/2
Roll a die one time. Find P(even number).
1/2
1/3
3/6
2/6
Roll a die one time. Find P(a number less than 7).
0
1
7/6
1/6
Roll a die one time. Find P(a number greater than 3 or odd).
0
1/2
5/6
1/6
Draw one card from a standard deck. Find P(ace)
1/13
1/4
4/13
1/52
Draw one card from a standard deck. Find P(diamond)
8%
25%
31%
2%
Draw one card from a standard deck. Find P(ace of diamonds)
1/13
1/4
4/13
1/52
Draw one card from a standard deck. Find P(4 or club)
17/52
2/13
4/13
1/26
Draw one card from a standard deck. Find P(black and a 10)
17/52
2/13
4/13
1/26
Rolling a pair of dice, find P(rolling doubles).
1/2
1/12
1/6
1/9
Rolling a pair of dice, find P(sum > 9).
1/2
1/12
1/6
1/9
Rolling a pair of dice, find P(sum is 7 or 11).
50%
16%
17%
22%
Rolling a pair of dice, find P(sum is 5).
11%
25%
17%
22%
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