This lesson includes 68 additional questions and 608 additional question variations for subscribers.

# Lesson Worksheet: Probability and Simple Events Mathematics

In this worksheet, we will practice finding the probability of a simple event.

**Q1: **

If a letter is selected at random from the word “laboratory”, what is the probability of selecting “o”?

- A
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- D

**Q2: **

A deck of cards contains cards numbered 1 to 52. If a card is picked at random, what is the probability of drawing a card that has a prime number greater than 18?

- A
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- E

**Q3: **

A deck of cards contains 28 cards numbered 1 to 28. If a card is drawn at random, what is the probability of getting a card with a number between 12 and 26?

- A
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- D

**Q4: **

Find, in percentage form, the probability of the arrow on this spinner landing on a number less than 39.

**Q5: **

A pack contains 13 cards numbered from 3 to 15. If a card is selected at random, what is the probability of the card having an odd number?

- A
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- D1

**Q6: **

A card is drawn at random from a deck of cards numbered from 2 to 46. What is the probability that the drawn card is numbered by a multiple of 9?

- A
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- E

**Q7: **

A deck of cards contains cards numbered 1 to 71. If a card is picked at random, what is the probability of picking a card with a prime number?

- A
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- D

**Q8: **

A card is drawn at random from a deck of cards numbered 1 to 93. What is the probability that the drawn card has a number whose units digit is 7?

- A
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- E

**Q9: **

A bag contains a set of balls numbered from 15 to 27. If a ball is chosen at random, what is the probability of selecting a ball which has an odd number?

- A
- B
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- D1

**Q10: **

For safety reasons, color-coded helmets are worn by different types of workers on construction sites. On each site, a chart is marked up with the number of each type of worker present every working day. The table below shows the number of each type of worker present last Tuesday on the site for Garden Towers II. Find the probability that a worker chosen at random last Tuesday was a supervisor.

- A
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- D