The Multiplication Principle

1
The Multiplication Principle
1. You choose 2 cards out of a pack of playing
cards, without replacement, and A is the event
that you deal an Ace.
a) P(deal 2 aces)
b) P(deal at least 1 ace)
AA or AA or AA
OR P(deal at least 1 ace) 1 AA
2
2. In a group of people, what is the probability
that at least two will have their birthday on the
same day?
2 people in the group
0.00274
PP
3 people in the group
PPP PPP PPP PPP
0.000007506
0.00273222
0.00273222
0.008204
0.00273222
3
OR 1 PPP
1 0.991796
0.008204
Exercise 3.4b Mathematics Statistics Unit S1 -
WJEC Homework 2