GeomS2_-_M12L07_(H)_Study_Sheet_ - Name: Abad, Charmaine...

Name: Abad, Charmaine
Module: 12 Geometry Study Sheet
Lesson: 7 (H)
Title: Combinations
Objective(s)
Today I will:
● 9.1H: Understand set theory using models such as
two-way tables, Venn diagrams, tree diagrams, and
also include the use of permutations and
combinations.
● 9.2H: Calculate probabilities of subsets of a sample
space including unions, intersections, complements,
and compound events.
Essential
Question:
How are sets
and their
relationships
used to
calculate
probabilities?
● Determine the number of combinations of n
objects taken r at a time.
● Use combinations and permutations to calculate
probability.
Warm-Up
#1: Calculate the number of permutations of the set {P, Q, R, S} if two elements are taken at a time.
#2: List all the permutations of the set {P, Q, R, S} if two elements are taken at a time.
Vocabulary
Term Definition Example
Combination An arrangement of objects in which PQ, PR, PS, QR, QS, RS

order is not important
n
C
r
= n!/r!(n-r)!
“You Try” Example from the Lesson
Ex 1: The ten members of the math club want to choose a president, vice-president, and a treasurer. How
many combinations are possible?