Describing Events as Subsets of a Sample Space Using Characteristics of Outcomes

Based on past experiences, Miss Olenik knows that 0.25 of the mistakes on the essays she grades are grammar mistakes, .125 of the mistakes are spelling mistakes, and .083 of the mistakes are both grammar and spelling mistakes. If an essay is selected at random, what is the probability that the essay contains a grammar mistake or a spelling mistake?

P(Pizza or Water) =

• 264/400

• 42/400

• 58/400

• 264

• 42

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A recent study of a metropolitan area found that 31% of people owned a SUV, 74% of people surveyed owned a car, and 10% owned both. What's the probability that a randomly chosen person owned a SUV or a car?

• 85%

• 95%

• 5%

• 15%

Tags

CCSS.HSS.CP.B.7

P(F ∪ S)

• 751/1792

• 173/1792

• 194/1792

• 968/1792

Tags

CCSS.HSS.CP.B.7

CCSS.HSS.CP.A.1

Find P(D∪F).

• 60%

• 75%

• 25%

• 100%

Tags

CCSS.HSS.CP.B.7

CCSS.HSS.CP.A.1

The occurrence of one event or the other, or both.

• Intersection

• Union

• Mutually Exclusive

• Conditional

P(F OR S)

• 751/1792

• 173/1792

• 194/1792

• 968/1792

Tags

CCSS.HSS.CP.B.7

CCSS.HSS.CP.A.1

What statement does the shaded region represent?

• or B

• and B

• A

• B

If one passenger is selected at random, find P(B U S).

A= first class passenger

B= second class passenger

S= survived

• 0.51

• 0.15

• 0.60

• 0.09

When combining events using "OR" we are looking at the (a)   of two events.