IXL - Probability of mutually exclusive and overlapping events (Algebra 1 practice)

You spin the spinner once.

2345

What is P(greater than 3 or less than 3)?

Write your answer as a percentage.

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Learn with an example

question

You roll a 6-sided die.

What is P(6 or less than 6)?

Write your answer as a percentage.

key idea

Mutually exclusive events can never occur at the same time. If A and B are mutually exclusive, then:

P(A or B) = P(A) + P(B)

solution

The events 6 and less than 6 are mutually exclusive. It's impossible for a die roll to be both at the same time.

Find P(6). The die has 6 sides, numbered 1, 2, 3, 4, 5, and 6.

P(6)

Find P(less than 6). The numbers less than 6 are 1, 2, 3, 4, and 5. There are 5 numbers less than 6.

P(less than 6)

Find P(6 or less than 6).

P(6 or less than 6)

= P(6) + P(less than 6)

Write your answer as a decimal. Then convert your answer to a percentage.

100%

P(6 or less than 6) = 100%

Looking for more? Try these:

Lesson: Probability

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Lesson: Probability

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