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# Identify complementary events and use the sum of probabilities to solve problems (VCMSP294)

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## LO: To identify complementary events and use the sum of probabilities to solve problems. Know:

• ### I can identify complementary events and use the sum of probabilities to solve problems.

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## Complementary Events

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### A very common misunderstanding is that events have to be equally likely. In reality, this does not necessarily need to be the case.

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## Sum of Probabilities

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#### eg.) probability of rolling a 6 is 1 out of 6, 1/6. The probability of rolling a number 5 or less would be 1 – 1/6 = 5/6 or 5 out of 6 chance.

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