Quiz about Probability TSI

Question 1

Two fair six-sided dice are rolled. What is the probability that the sum of the numbers rolled is 9?

Accepted Answer

$$\frac{1}{9}$$

Answer

$$\frac{2}{9}$$

Answer

$$\frac{1}{4}$$

Answer

$$\frac{1}{18}$$

Question 2

Three fair coins are flipped. What is the probability that all three will be heads or all three will be tails?

Accepted Answer

$$\frac{1}{4}$$

Answer

$$\frac{1}{16}$$

Answer

$$\frac{1}{12}$$

Answer

$$\frac{1}{8}$$

Question 3

A fair six-sided die is rolled. Which event is most likely?

Accepted Answer

rolling a number 3 or less.

Answer

rolling a number greater than 3 and less than 6.

Answer

More information is needed.

Answer

Both outcomes are equally likely.

Question 4

A box contains 4 red balls, 5 blue balls, and 3 green balls. One ball is selected at random. What is the probability that the ball is not blue?

Accepted Answer

$$\frac{7}{12}$$

Answer

$$\frac{5}{12}$$

Answer

$$\frac{1}{2}$$

Answer

$$\frac{2}{3}$$

Question 5

A bag contains 5 red marbles and 3 blue marbles. Two marbles are drawn one after the other without replacement. What is the probability that both marbles are red?

Accepted Answer

$$\frac{5}{14}$$

Answer

$$\frac{5}{16}$$

Answer

$$\frac{25}{56}$$

Answer

$$\frac{10}{49}$$

Question 6

A die is rolled, and a coin is flipped. What is the probability of rolling a number greater than 4 and flipping tails?

Accepted Answer

$$\frac{1}{6}$$

Answer

$$\frac{1}{2}$$

Answer

$$\frac{1}{3}$$

Answer

$$\frac{1}{4}$$

Question 7

A card is drawn from a standard deck. Given that the card is red, what is the probability that it is a heart?

Accepted Answer

$$\frac{1}{2}$$

Answer

$$\frac{1}{4}$$

Answer

$$\frac{1}{13}$$

Answer

$$\frac{1}{26}$$

Question 8

A spinner is divided into six equal sections 1 through 6. What is the probability of landing on an even number or a 5?

Accepted Answer

$$\frac{2}{3}$$

Answer

$$\frac{1}{2}$$

Answer

$$\frac{5}{6}$$

Answer

$$\frac{1}{3}$$

Question 9

A number is randomly selected from the set:

{2,3,5,6,8,9,10,12}.

What is the probability that the number is divisible by 2 or 3?

Accepted Answer

$$\frac{7}{8}$$

Answer

$$\frac{1}{2}$$

Answer

$$\frac{5}{8}$$

Answer

$$\frac{3}{4}$$

Question 10

Two cards are drawn at random from a standard deck without replacement. What is the probability that both cards are kings?

Accepted Answer

$$\frac{1}{221}$$

Answer

$$\frac{4}{13}$$

Answer

$$\frac{1}{52}$$

Answer

$$\frac{2}{51}$$

Question 11

Spinner A has 4 equal sections numbered 1 to 4. Spinner B has 5 equal sections numbered 1 to 5. Each spinner is spun once. What is the probability that the product of the two results is even?

Accepted Answer

$$\frac{7}{10}$$

Answer

$$\frac{3}{5}$$

Answer

$$\frac{4}{5}$$

Answer

$$\frac{1}{2}$$

Question 12

A clothing store marks up its prices by 40% above the wholesale cost. During a sale, all items are discounted by 25% from the marked price. What is the final price of a jacket that originally had a wholesale cost of $80?

Accepted Answer

$84.00

Answer

$90.00

Answer

$96.00

Answer

$100.00

Question 13

If 60% of a number is 48, what is 125% of the same number?

Accepted Answer

100

Answer

110

Answer

120

Answer

125

Question 14

A student scored 72% on the first test and 88% on the second test. Both tests are weighted equally. What is the average score?

Accepted Answer

80%

Answer

78%

Answer

82%

Answer

84%

Question 15

The price of a phone was reduced by 10%, and then a 5% sales tax was added to the discounted price. If the original price was $800, what is the final price?

Accepted Answer

$756

Answer

$742

Answer

&760

Answer

$769.50

Question 16

A student answered 85% of the 60 questions on a math test correctly. How many questions did the student miss?

Accepted Answer

9

Answer

6

Answer

12

Answer

15

Question 17

A shirt was priced at $50 last month and is now selling for $40. What is the percentage decreased?

Accepted Answer

20%

Answer

15%

Answer

18%

Answer

25%

Question 18

A school has 1,200 students, 60% are enrolled in at least one math class, and 25% of those take calculus. How many students are taking calculus?

Accepted Answer

180

Answer

200

Answer

300

Answer

400

Question 19

A bag has 3 red and 2 blue balls. Two balls are drawn without replacement. What is the probability that both are red?

Accepted Answer

$$\frac{3}{10}$$

Answer

$$\frac{1}{5}$$

Answer

$$\frac{3}{5}$$

Answer

$$\frac{6}{20}$$

Question 20

A spinner is divided into 4 equal sections: red, blue, green, and yellow. If you spin it 3 times, what is the probability that you never land on red?

Accepted Answer

$$\frac{27}{64}$$

Answer

$$\frac{1}{4}$$

Answer

$$\frac{3}{4}$$

Answer

$$\frac{3}{64}$$

Probability TSI

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