Probability

Identify independent and dependent events

Events are independent when the outcome of one event does not influence the outcome of a second event. When the outcome of one event affects the outcome of a second event, the events are dependent.

Tell whether the events are independent or dependent.

a.	You flip heads on one coin and tails on another coin.
	The outcome of fl ipping one coin does not affect the outcome of flipping the other coin. So, the events are independent.

b.	Your teacher chooses one student to lead a group, and then chooses another student to lead another group.
	The teacher cannot pick the same student to lead both groups. So, there are fewer students to choose from when the leader of the second group is chosen. So, the events are dependent