Summary (Grade 12 NSC Matric Mathematics): Quizzes

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What is the formula for P(A or B)P(A \text{ or } B) for any two events?

P(A)+P(B)−P(A and B)P(A) + P(B) - P(A \text{ and } B)

For mutually exclusive events, what is P(A or B)P(A \text{ or } B)?

P(A)+P(B)P(A) + P(B)

What does the complementary rule state?

P(not A)=1−P(A)P(\text{not } A) = 1 - P(A)

For independent events A and B, what is P(A and B)P(A \text{ and } B)?

P(A)×P(B)P(A) \times P(B)

What is true about dependent events?

One affects the probability of the other

Which visual tool is best for sequential events?

Tree diagrams

When should you use Venn diagrams?

For unions, intersections, and complements

Using the fundamental counting principle, if event A has 5 outcomes and B has 3, how many combined?

15

How many possibilities exist when choosing 4 times from 6 objects with replacement?

646^4

What represents the number of arrangements of nn different objects?

n!n!

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