Probability Calculations

Probability denotes possibility. To be able to find the probability of a single event to occur, we need to know the total number of possible outcomes first.

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How many possible outcomes are there if a coin is tossed?

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Both the probability of events happening and they not happening should add up to 1. Is this statement true or false?

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What does it mean when the probability of an event happening is 0?

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You pull out a green shirt from a bag of 5 red shirts and 4 green shirts. What is the probability that you will pull out a green shirt again if you do not replace the first one?

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What is the notation for probability of event A not happening?

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Jack has an ATM card with a 3-digit pin code - but he has forgotten the numbers! The code can be made of any digit from 0 to 5 and the numbers cannot be repeated. What is the probability that Jack can guess the code correctly? 


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Total outcomes you desire to happen is also known as

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A coach randomly assigns a group of soccer players to Team A (out of 6 boys and 8 girls). The first person picked is a boy. What are the chances the second person on Team A is also a boy? 


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What is the notation for probability of event A happening?


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What are compound events?

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What is probabilty?

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  • Immunology
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  • Mo

How many possible outcomes are there if a coin is tossed?

Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

Both the probability of events happening and they not happening should add up to 1. Is this statement true or false?

Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

What does it mean when the probability of an event happening is 0?

Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

You pull out a green shirt from a bag of 5 red shirts and 4 green shirts. What is the probability that you will pull out a green shirt again if you do not replace the first one?

Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

What is the notation for probability of event A not happening?

Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

Jack has an ATM card with a 3-digit pin code - but he has forgotten the numbers! The code can be made of any digit from 0 to 5 and the numbers cannot be repeated. What is the probability that Jack can guess the code correctly? 


Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

Total outcomes you desire to happen is also known as

Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

A coach randomly assigns a group of soccer players to Team A (out of 6 boys and 8 girls). The first person picked is a boy. What are the chances the second person on Team A is also a boy? 


Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

What is the notation for probability of event A happening?


Show Answer
  • + Add tag
  • Immunology
  • Cell Biology
  • Mo

What are compound events?

Show Answer
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  • Immunology
  • Cell Biology
  • Mo

What is probabilty?

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Contents
Table of contents
    Frequently Asked Questions about Probability Calculations

    How do you calculate probability?

    How to calculate probability: divide the number of events by the number of possible outcomes. This will give us the probability of a single event occurring.

    How do you calculate probability using Venn diagrams?

    How to calculate probability using Venn diagrams: List and group all possible events using set notation. After the listing is done, we use algebra or simple calculations to find the ratios or probabilities. 

    What is the formula of probability?

    Probability = Number of favourable outcomes/ Total number of outcomes

    How do you find the probability of two events?

    How to find the probability of two events: just multiply the probability of the first event by the second. For example, if the probability of event A is 2/9 and the probability of event B is 3/9 then the probability of both events happening at the same time is (2/9)*(3/9) = 6/81 = 2/27.

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