Probability of single events

Tom has 7 nickels, 5 dimes, and 8 quarters in his pocket. A coin is picked at random.

What is the probability that a nickel is picked?

• 7/20

• 5/20

• 8/20

• 0

Tom has 7 nickels, 5 dimes, and 8 quarters in his pocket. A coin is picked at random.

What is the probability that a nickel or dime is picked?

• 7/20

• 3/5

• 5/20

• 3/4

Tom has 7 nickels, 5 dimes, and 8 quarters in his pocket. A coin is picked at random.

What is the probability that a dime is NOT picked?

• 3/5

• 1/4

• 13/20

• 0

There were 9 boys, 11 girls, 5 women, and 5 men at a party. A magician at the party selects a person randomly to assist him with his magic trick.

Find the probability that the person selected is a child.

• 1/3

• 2/3

• 1/20

• 1/30

There were 9 boys, 11 girls, 5 women, and 5 men at a party. A magician at the party selects a person randomly to assist him with his magic trick.

Find the probability that the person selected is a male.

• 1/5

• 1/14

• 7/15

• 1/30

A box contained 6 blue balls, 5 red balls, and 3 yellow balls. One ball is randomly selected.

What is the probability that the ball selected is red or yellow?

• 3/7

• 4/7

• 3/14

• 5/14

A letter is randomly chosen from the word "MATHEMATICS".

What is the probability that the letter chosen is either "M" or a vowel?

• 1/6

• 1/11

• 5/11

• 6/11