Facebook______55________________125

no Facebook __________20_____ ______

col. totals___90_____________________grand total

Answer the following probability problems from the completed contingency table. Write the answers first as fractions then rounded to the nearest thousandth.

The inclusion exclusion rule tells us

*p*(

*A*UNION

*B*) =

*p*(

*A*) +

*p*(B) -

*p*(

*A*INTERSECTION

*B*)

*p*(Facebook) = _________ ~= __________

*p*(Male) = _________ ~= __________

*p*(Male INTERSECTION Facebook) = _________ ~= __________

*p*(Male UNION Facebook) = _________ ~= __________

Time problems.

a) How many minutes in 3 days?

b) 560 hours is __________ days and ________ hours.

c) 8,086 seconds is ________ hours, ________ minutes and __________ seconds.

d) 8,086 hours is ________ weeks, ________days and __________ hours.

e) After a flu outbreak, a hospital has decided quarantine will last 66 hours. If it starts at 5:00 pm on Tuesday, give the day and time when it will be over.

Day: ________ time: ___________ a.m or p.m? __________

Answers in the comments.

## 2 comments:

Facebook:___ 55 70 125

no Facebook: 35 20 55

column totals: 90 90 180

time problems.

a) How many minutes in 3 days?

Answer: 3 x 24 x 60 =

4,320 minutesb) 560 hours is __________ days and ________ hours.

560/24 = 23.333333...

.3333 = 1/3 and 24 x 1/3 = 8

23 days and 8 hoursc) 8,086 seconds is ________ hours, ________ minutes and __________ seconds.

8086/3600 = 2.24611111....

>DMS

2:14:46d) 8,086 hours is ________ weeks, ________days and __________ hours.

8086 [A b/c] 24 = 336 11/12

11/12 x 24 = 22

336 [A b/c] 7 = 48

8,086 hours is 48 weeks and 22 hours.e) After a flu outbreak, a hospital has decided quarantine will last 66 hours. If it starts at 5:00 pm on Tuesday, give the day and time when it will be over.

Answer: 66 [A b/c] 24 = 2 3/4

3/4 * 24 = 18

Adding two days to Tuesday puts us to Thursday at 5:00 pm. Adding 18 hours to 5pm puts us into the next morning, so the answer is

Friday, 11:00 am.Thanks to Elsy Tobar for pointing out errors in the answers.

______________M__F__row totals

Facebook:___ 55 70 125

no Facebook: 35 20 55

column totals: 90 90 180

p(Facebook) =125/180 ~= .694p(Male) =90/180 = .500p(Male INTERSECTION Facebook) =55/180 ~= .306p(Male UNION Facebook) =160/180 ~= .889Post a Comment