Problems Involving Probabilities of Events (Math 8)
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This document contains 30 probability problems involving events such as choosing days of the week, selecting marbles from a jar, drawing cards from a deck, rolling dice, and tossing coins. The student is asked to calculate the probability of various outcomes for each scenario.
Problems Involving Probabilities of Events (Math 8)
- 1. (Mathematics 8) JOEY F. VALDRIZ
- 2. Directions: Answer the following problems involving probabilities of events.
- 3. 1. Earl is asked to choose a day from a week. What is the probability of choosing a day which starts with S?
- 4. 2. Choosing a month from a year, what is the probability of selecting a month with 30 days?
- 5. 3. If a letter is chosen at random from the word PERSEVERANCE, what is the probability that the letter chosen is E?
- 6. 4. If one letter is chosen from the word TRUSTWORTHY, what is the probability that the letter chosen is a consonant?
- 7. 5. There are six balls in a jar. They are numbered from 11 to 16. If a ball is drawn, what is the probability that it shows a composite number?
- 8. 6. A box contains 7 red marbles, 5 orange marbles, 4 yellow marbles, 6 green marbles, and 3 blue marbles. What is the probability of drawing an orange marble?
- 9. 7. There are 45 students in a class. 25 of them are boys. If a student is selected at random for a field trip, what is the probability of selecting a girl?
- 10. 8. There are 51 students in a class. 24 of them are boys. If a student is selected at random for a field trip, what is the probability of selecting a boy?
- 11. 9. What is the probability of getting an 8 from a deck of cards?
- 12. 10. A spinner is divided equally and numbered as follows: 1, 2, 2, 3, 3, 4, 1, 1, 2, 4, 1, 2, 3, 4, 1, 2. What is the probability that the pointer will stop at a number which is both prime and odd?
- 13. 11. In a deck of cards, what is the probability of drawing a red king?
- 14. 12. In rolling a die, what is the probability of getting a number greater than 4?
- 15. 13. A letter is to be selected from the name of your section. What is the probability that it is a consonant letter?
- 16. 14. There 25 boys and 22 girls in a class. A student is to be selected. What is the probability that it is a girl?
- 17. 15. There are 4 green chips, 6 orange chips, 2 red chips, 5 yellow chips, and 3 blue chips in a jar. A chip is to be drawn from the jar. What is the probability that it is a color that is not green?
- 18. 16. A color is to be selected from the colors of the rainbow. What is the probability of selecting a primary color?
- 19. 17. In a deck of cards, what is the probability of getting a card that is not a face card?
- 20. 18. A container has balls numbered from 1 through 30. What is the probability of drawing a ball that shows a number divisible by 4?
- 21. 19. There are 2 white buttons, 6 black buttons, 3 pink buttons, 4 purple buttons, and 5 gray buttons in a kit. What is the probability of drawing a button that is black or white?
- 22. 20. On a six-sided die, each side has a number from 1 to 6. What is the probability of throwing a 3 or a 4?
- 23. 21. In drawing a card from a pack of cards, what is the probability of getting a 3 or 4?
- 24. 22. There are 4 triangles, 2 quadrilaterals, 5 pentagons, 7 hexagons and 3 octagons. What is the probability of selecting a polygon with a number of sides that is an even number?
- 25. 23. In all two-digit numbers, what is the probability of selecting a number divisible by 5?
- 26. 24. Two coins are tossed. What is the probability of getting one head and one tail?
- 27. 25. Two dice are rolled. What is the probability that the dice show numbers which have a sum of 7?
- 28. 26. Two dice are rolled. What is the probability that both dice show even number?
- 29. 27. Three coins are tossed. What is the probability of getting one head and two tails?
- 30. 28. A family has 3 children. What is the probability of having both the eldest and the middle child boys?
- 31. 29. A coin is tossed and a die is rolled at the same time. What is the probability that a head and an even number will be shown?
- 32. 30. Two letters will be chosen from the words KOBE and BRYANT. The first letter will come from KOBE and the second letter will come from BRYANT. What is the probability that the first and second letters are both vowel?