Simple Theoretical and Experimental Probability

A science class has 8 female students. Out of a total of 20 students in the class, what is the probability of randomly selecting a male student from the class?

• 12%

• 40%

• 50%

• 60%

Alex has 6 shirts and 3 pairs of pants in his closet. Alex randomly picks 1 item of clothing.

Which statement is true?

• It is certain that Alex picks a pair of pants.

• It is certain that Alex picks a shirt.

• It is more likely that Alex picks a pair of pants.

• It is more likely that Alex picks a shirt.

Meredith is randomly choosing a pair of socks from her dresser. She has 6 pairs of white socks, 8 pairs of black socks, and 14 pairs of gray socks.

Which statement is true?

• Meredith has an unlikely chance of choosing a pair of gray socks.

• Meredith has a likely chance of choosing a pair of white socks.

• Meredith has a likely chance of choosing a pair of black socks.

• • Meredith has neither an unlikely nor likely chance of choosing a pair of gray socks.

If Lexi spins the spinner once, what is the probability she will land on "X"?

• 3/5

• 1/5

• 3/7

• 3/8

Ross is tossing a fair coin. He tosses the coin twenty times, and it lands on heads sixteen times.

If Ross tosses the coin a twenty-first time, what is the probability that it will land on tails?

• 4/5

• 2/5

• 1/2

• 1/5

What fraction(s) could represent probabilities? Select all that apply.

• 1/5

• 2/3

• 4/7

• 5/2

• 11/6

The probability of an event is 0. Which would best describes this event?

• Certain

• Impossible

• Likely

• Unlikely

• Equally Likely

A student claims that a probability of 0.5 means that the event is likely to occur. Is the student correct?

• Yes. A probability greater than or equal to 1/2 means the event is likely to occur.

• • Yes. Any probability greater than 0 means the event is likely to occur.

• • No. A probability of 1/2 means the event is neither likely nor unlikely.

• • No. Any probability less than 1 means the event is impossible.

The table shows the results of three coins tossed simultaneously 200 times. Based on the data, what is the experimental probability of only 2 heads showing up?

• 9/25

• 19/40

• 43/50

• 18/25

Owen suspects that a coin is not properly balanced and flips it 30 times. When he flipped the coin 30 times there were 26 tails. If he flips the coin 15 more times, he should expect to see heads ________ times.

• 2

• 8

• 13

• 15