Lesson: Applied Arithmetic - 26t01

 Multiple Event Probability

[Page 27 of 36]

Many probability questions involve finding the probability of a certain outcome after multiple events take place (a coin is tossed several times, etc.). These questions can be slightly trickier than the previous example.

To determine multiple-event probability where each individual event must occur a certain way:

  • Figure out the probability for each individual event.
  • Multiply the individual probabilities together.

Let's see an example:

If a fair 2-sided coin is tossed three times, what is the probability of tossing heads the first 2 times and tails the third time?

Task Type the answers into the fields provided, and then click Continue.
1.   What's the probability that:

Heads will come up the first time?
The probability of tossing heads the first time is .

Heads will come up the second time?
The probability of tossing heads the second time is .

Tails will come up the third time?
The probability of tossing tails the third time is .
2.   So, the probability of tossing Heads, Heads, Tails =
The probability of tossing Heads, Heads, Tails is
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