Multiplication rules and Conditional Probability

How can multiplication rules be used?

• The multiplication rules can be used to find the probability of two or more events that occur in sequence.

State Multiplication rules [2]

Multiplication rules 

• Two events A and B are independent events if the fact that A occurs does not affect the probability of B occurring.

Multiplication Rules 

• independent event = mutually exclusive

or - and: describe

• “or”=add

• “and”= multiply 

Multiplication Rule 1

• ( both independent) 

Conditional probability and events, expound

• The conditional probability of an event B in relationship to an event A is the probability that event B occurs after event A has already occurred.

• Event B can only happen if event A happens (event A MUST HAPPEN FIRST) 

  • P(B→A)

Multiplication Rule 2 mutually exclusive)

CONDITIONAL PROBABILITY formula