Quiz 1: Probability

Which event is certain?

• It will rain today.

• Stone will sink in the water.

• The tree will talk in the afternoon.

• A mother will give birth to a baby girl.

A die is rolled. What is the probability that a prime number comes up?

• 5/6

• 3/4

• 1/2

• 1/3

Which event is impossible?

• December comes after November.

• Easter Sunday is celebrated in March.

• A Filipino wins an Olympic gold medal.

• Valentine's Day falls on Friday the 13th.

Two coins are tossed. What is the probability that at least one tail will turn up?

• 1/4

• 1/3

• 1/2

• 3/4

What is the probability of obtaining an odd number with one throw of a die?

• 5/6

• 3/4

• 1/2

• 1/3

Tonton has 10 green, 9 brown and 6 white marbles in a box. What is the probability that, without looking, Tonton will pick a green marble from the box?

• 40%

• 36%

• 24%

• 18%

A pair of dice is tossed. Find the probability of getting a sum of 8.

• 5/36

• 1/6

• 7/36

• 1/3

If 4 coins are tossed, what is the probability of getting 3 heads and 1 tail?

• 1/2

• 1/3

• 1/4

• 1/5

A class has 15 boys and 20 girls. If a student is picked at a random, what is the probability that the student is a girl?

• 4/7

• 3/7

• 3/4

• 2/3

A drawer is filled with white and blue socks. If the probability of selecting a white socks at random is 3/5, what is the probability that a blue sock will be chosen?

• 1/5

• 2/5

• 3/5

• 2/3