11-2 TWO-WAY TABLES

Mary is a good student. The probability that she studies and passes her test is 3/5. If the probability that she studies is 8/9. What is the probability that she passes given that she studies? 

• 27/40

• 1.48

• .008

• .0593

Answer explanation

P(A&B) = P(A) * P(BlA)

3/5 = 8/9 * P(BlA)

DIVIDE

Tags

CCSS.HSS.CP.B.6

What is the probability that the person picked will be a boy given they speak german? 

• .7273

• .4

• .16

• .22

Answer explanation

8/11

Tags

CCSS.HSS.CP.A.4

What is the probability that a student does play a sport given they do not play an instrument? 

• .2

• .2222

• .10

• .5

Answer explanation

2/9

Tags

CCSS.HSS.CP.A.4

A new credit card has been issued to 2000 customers. Of these customers, 1500 hold a Visa, 500 hold an AA card, and 40 hold a Visa and AA card. Find the probability that a random chosen customer holds a Visa and AA card, given they hold a Visa. 

• .0267

• 37.5

• .02

• .3333

Answer explanation

P(A&B)=P(A) * P(BlA)

40/2000 = 1500/2000 * P(BlA)

DIVIDE

Tags

CCSS.HSS.CP.B.6

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10

• 3/9

• 1/9

• 1/3

Answer explanation

3/9 = 1/3

Tags

CCSS.7.SP.C.7B

P(Sandals|Pants):

• 4/20

• 6/15

• 1/2

• 2/7

Answer explanation

4/14 = 2/7

Tags

CCSS.HSS.CP.A.4

What is the probability that a student has a brother given that they do not have a sister?

*Write your answer as a fraction*

Answer explanation

7/10

Tags

CCSS.HSS.CP.A.4

What is the probability that a student plays a sport given that they play an instrument?

*Write your answer as a fraction*

Tags

CCSS.HSS.CP.A.4

What is the probability that a student plays a sport or that they play an instrument?

*Write your answer as a fraction*

Tags

CCSS.HSS.CP.B.7

What is P(Foreign language | Sport)?

• 14/27

• 7/12

• 23/47

• 37/47

Answer explanation

14/24

Tags

CCSS.HSS.CP.B.6