joel168
joel168 6d ago โ€ข 6 views

Understanding Probability Events: Definition and Examples for Grade 7

Hey there! ๐Ÿ‘‹ Ever wondered how likely something is to happen? ๐Ÿค” Well, that's probability! Let's break it down with some examples and then test your knowledge with a fun quiz! Ready to dive in?
๐Ÿงฎ Mathematics

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michael817 Dec 27, 2025

๐Ÿ“š Understanding Probability Events: A Quick Study Guide

    ๐Ÿ” Probability: Probability is a measure of how likely an event is to occur. It is expressed as a number between 0 and 1. ๐Ÿ’ก Event: An event is a specific outcome or a set of outcomes of a random experiment. ๐Ÿ“ Simple Event: A simple event is an event that has only one outcome. Example: Flipping a coin and getting heads. ๐Ÿ“Š Formula: The probability of an event (P(event)) is calculated as: $P(event) = \frac{Number\ of\ favorable\ outcomes}{Total\ number\ of\ possible\ outcomes}$ ๐ŸŽฒ Example 1: Rolling a fair six-sided die. The probability of rolling a 4 is $\frac{1}{6}$ because there is only one '4' and six total sides. โšฝ Example 2: Drawing a marble from a bag containing 3 red marbles and 5 blue marbles. The probability of drawing a red marble is $\frac{3}{8}$. ๐Ÿงฎ Key Concepts:
      ๐Ÿ“Œ Certain Event: An event that will definitely occur (probability = 1). ๐Ÿ“ Impossible Event: An event that cannot occur (probability = 0).

๐Ÿงช Practice Quiz

  1. What is the probability of flipping a fair coin and getting tails?
    1. $\frac{1}{4}$
    2. $\frac{1}{3}$
    3. $\frac{1}{2}$
    4. 1
  2. A bag contains 2 green balls and 8 yellow balls. What is the probability of picking a green ball?
    1. $\frac{1}{10}$
    2. $\frac{1}{5}$
    3. $\frac{2}{5}$
    4. $\frac{4}{5}$
  3. What is the probability of rolling a 7 on a standard six-sided die?
    1. $\frac{1}{6}$
    2. 1
    3. $\frac{1}{2}$
    4. 0
  4. A spinner has 4 equal sections colored red, blue, green, and yellow. What is the probability of landing on blue?
    1. $\frac{1}{2}$
    2. $\frac{1}{3}$
    3. $\frac{1}{4}$
    4. 1
  5. If you have a deck of 52 cards, what is the probability of drawing a heart?
    1. $\frac{1}{2}$
    2. $\frac{1}{4}$
    3. $\frac{1}{13}$
    4. $\frac{4}{13}$
  6. A jar contains 5 candies: 1 grape, 2 strawberry, and 2 cherry. What is the probability of picking a strawberry candy?
    1. $\frac{1}{5}$
    2. $\frac{2}{5}$
    3. $\frac{3}{5}$
    4. $\frac{4}{5}$
  7. What is the probability that the sun will rise tomorrow?
    1. 0
    2. $\frac{1}{2}$
    3. $\frac{1}{4}$
    4. 1
Click to see Answers
  1. C
  2. B
  3. D
  4. C
  5. B
  6. B
  7. D

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