Emmas Class Notes Sept 21

Sup this is Emma here. aka Simon

In class today we discussed the Independent and the Dependent Events.

Independent: No affect on each other
Dependent : There is an affect on each other.
*For only independent Events the formula is......P(A+B) = P(A)*P(B)

Example: A test is made up of 5 multiple questions, each with 4 possible answers. What is probability that you will at least get 1 answer correct, if you guess all 5 answers?

ANSWER:
P(no correct answer) = 3/4 * 3/4 * 3/4 * 3/4 * 3/4
= (3/4) po 5 = .237
P(at least 1 correct answer) = 1-P(no correct answer)
= 1-.237
= 76.3% chance of at least 1 correct

Our Homwork was on Pg 31 #1-9

toodles!