Probability of single events

A 6-sided fair die is rolled once. Find the probability of obtaining an even number.

Each of letters of word S I N G A P O R E is written on a card. All the 9 cards are well-shuffled and placed face down on a table. If a card is randomly turned over, find the probability that the card bears a consonant.

A bag contains 2 red balls, 3 green balls, and 5 yellow balls. If a ball is picked randomly from the bag, find the probability that the ball is green.

A bag contains 15 black marbles, 12 white marbles and 25 blue marbles. If a marble is picked at random, find the probability that the marble is white.

Cards with numbers 0 to 12 inclusive are placed in a box. A card is picked at random from the box. What is the probability of drawing a prime number?

Darren is asked to choose a day from a week. What is the probability of choosing a day which starts with S?

If a letter is chosen randomly from the word PERSEVERANCE, what is the probability that the letter chosen is E?

Of the 36 students in a class, 24 are boys. If a student is selected at a random for a field trip, what is the probability of selecting a girl?

A die is thrown once. What is the probability that the score is a factor of 6?

Miss Ward spins a wheel to determine the number of homework problems to assign. There are 20 sections labeled 1–20. What is the probability that there will be fewer than 13 problems assigned for homework?

• 13/20

• 3/5

• 4/9

• 7/20