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EDEXCEL GCSE FOUNDATION MATHS - What is Probability

Author Zak  |  Date 2024-10-21 20:39:16  |  Category Maths
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Edexcel GCSE Foundation Maths: What is Probability?

Probability is a way of measuring how likely something is to happen. It's expressed as a fraction, decimal or percentage between 0 and 1 (or 0% and 100%).

Here's a breakdown:

Here's how to calculate probability:

  1. Identify the total number of possible outcomes. For example, if you roll a die, there are six possible outcomes (1, 2, 3, 4, 5, 6).
  2. Identify the number of favorable outcomes. For example, if you want to know the probability of rolling a 3, there is one favorable outcome.
  3. Calculate the probability by dividing the number of favorable outcomes by the total number of possible outcomes. In this case, the probability of rolling a 3 is 1/6.

Example:

You have a bag with 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of picking a blue marble?

  1. Total possible outcomes: 10 (5 + 3 + 2)
  2. Favorable outcomes: 3 (blue marbles)
  3. Probability: 3/10

Key Terms:

Practice:

  1. What is the probability of rolling a 6 on a standard die?
  2. You have a deck of 52 playing cards. What is the probability of drawing a heart?
  3. A bag contains 10 balls, 4 of which are red. What is the probability of picking a red ball?

Remember:

Probability helps us make predictions and understand the likelihood of events. It's a valuable tool for making decisions in everyday life.