Question

The probability that a dessert sold at a certain cafe contains chocolate is 73%. The probability that a dessert containing chocolate also contains nuts is 25%. Find the probability that a dessert chosen at random contains nuts given that it contains chocolate. Round to the nearest tenth of a percent.

Answer 1

@Luis_Rivera

Answer 2

@jim_thompson5910

Answer 3

Is my aswer 48 ?

Answer 4

Whoops wrong question. This is the one i meant to post !

Answer 5

An airline has 81% of its flights depart on schedule. It has 69% of its flights depart and arrive on schedule. Find the probability that a flight that departs on schedule also arrives on schedule.

Answer 6

P(Contains Nuts| Chocolate) = P(Chocolate and nuts)/P(Chocolate)

P(Contains Nuts| Chocolate) = 0.25/0.73

P(Contains Nuts| Chocolate) = 0.34246575342466

Answer 7

I posted the wrong question . Its above of what you said ^ ?

Answer 8

one sec

Answer 9

ok

Answer 10

P(Arrive On Schedule|Depart On Schedule) = P(Depart and Arrive On Schedule)/P(Depart On Schedule)


P(Arrive On Schedule|Depart On Schedule) = 0.69/0.81


P(Arrive On Schedule|Depart On Schedule) = 0.85185185185186

Answer 11

Thank you

Answer 12

Find the values of the 30th and 90th percentiles of the data.

18, 9, 7, 5, 11, 7, 17, 20, 19, 2, 17, 12, 5, 1, 13, 12, 11, 15, 16, 20

Answer 13

I got 30th percentile = 9
90th percentile = 20 but that answer isnt on my answer choice so what could it be ?

Answer 14

what do you get when you sort the data

Answer 15

Here's my asnwer choice
30th percentile = 7
90th percentile = 19

30th percentile = 9
90th percentile = 19

30th percentile = 11
90th percentile = 19

30th percentile = 7
90th percentile = 20

Answer 16

@jim_thompson5910

Answer 17

You there ?

Answer 18

what do you get when you sort the data

Answer 19

What do you mean ?

Answer 20

when you arrange the list from smallest number to largest number, what do you get?

Answer 21

Huh ? I just posted the question. After doing the problem i got I got 30th percentile = 9
90th percentile = 20

But that answer isnt on my answer problem. So i posted you the answer choice to see what one is really my answer,

Answer 22

example

the list 3, 1, 2 is not in order

but sorting them gives you 1, 2, 3

Answer 23

exactly

Answer 24

so sort the given list in your problem to get _____

Answer 25

After i sort them then whats my answer ?

Answer 26

I'll show you how to find it once you've sorted it

Answer 27

I have the correct answer just that correct answer isn't on my answer choice.

Answer 28

is my answer 30th percentile = 9
90th percentile = 19

or


30th percentile = 7
90th percentile = 20

Answer 29

the sorted list is

1, 2, 5, 5, 7, 7, 9, 11, 11, 12, 12, 13, 15, 16, 17, 17, 18, 19, 20, 20

Answer 30

there are 20 values in this list

so the 30th percentile is at location number 0.3*20 = 6

Answer 31

So the the 30th percentile is at location number 6

Answer 32

There is no 6

Answer 33

slot number 6

Answer 34

Here's my asnwer choice
30th percentile = 7
90th percentile = 19

30th percentile = 9
90th percentile = 19

30th percentile = 11
90th percentile = 19

30th percentile = 7
90th percentile = 20

Answer 35

which number is in slot 6

Answer 36

i know

Answer 37

7

Answer 38

?

Answer 39

yep

Answer 40

the number 7 is in slot 6 (6th spot from the left)

Answer 41

so 7 is the 30th percentile

Answer 42

whats 90th ? 19 ?

Answer 43

good

Answer 44

30th percentile = 7
90th percentile = 19

Answer 45

yep

Answer 46

correct ?

Answer 47

yep

Answer 48

Thank you. I have a few more,.

Answer 49

ok just a few though

Answer 50

Find the mean, median, and mode of the set of data

10, 11, 4, 7, 12, 11, 16, 6, 9, 15

Answer 51

mean = add up the numbers, then divide by 10

median = middle most number (after you sort the numbers)

mode = most occurring number

Answer 52

Thats it ?

Answer 53

tell me what you get when you follow those steps

Answer 54

Oh the mean is were i add them all

Answer 55

and divide by 10

Answer 56

yep

Answer 57

10.1

Answer 58

that's the mean, good

Answer 59

okay . . .

Answer 60

12 and 11 are in the middle

Answer 61

sort the data to get

4, 6, 7, 9, 10, 11, 11, 12, 15, 16

Answer 62

kidding 11

Answer 63

the middle most numbers are: 10, 11

average them to find the median

Answer 64

how ?

Answer 65

add subtract divide what ?

Answer 66

add them up, divide by 2

Answer 67

so my median is 10.5

Answer 68

yep

Answer 69

the mode is the value that shows up the most

Answer 70

11 ?

Answer 71

which number shows up the most

Answer 72

yep, 11

Answer 73

it shows up 2 times (everything else shows up 1 time)

Answer 74

Lucas recorded his lunch expenditure each day for one week in the table below.

Answer 75

Find the mean, standard deviation, and variance of Lucas’ lunch expenditures. Round to the nearest thousandth.

Answer 76

mean = add up the numbers and divide by 7

Answer 77

5.1

Answer 78

yep that's the mean

Answer 79

now subtract the mean from each value

Answer 80

what do you mean ?

Answer 81

@jim_thompson5910

Answer 82

4.85-5.1 = -0.25
5.10-5.1 = 0
5.50-5.1 = 0.4
4.75-5.1 = -0.35
4.50-5.1 = -0.6
5.00-5.1 = -0.1
6.00-5.1 = 0.9

Answer 83

So the differences are

-0.25, 0, 0.4, -0.35, -0.6, -0.1, 0.9

Answer 84

is that it for my problem or answer ?

Answer 85

Square each difference to get

(-0.25)^2 = 0.0625
(0)^2 = 0
(0.4)^2 = 0.16
(-0.35)^2 = 0.1225
(-0.6)^2 = 0.36
(-0.1)^2 = 0.01
(0.9)^2 = 0.81

Answer 86

So the list of squares are

0.0625, 0, 0.16, 0.1225, 0.36, 0.01, 0.81

Answer 87

Add them up to get

0.0625+0+0.16+0.1225+0.36+0.01+0.81 = 1.525

Divide by 6 to get 1.525/6 = 0.25416666666667

and finally take the square root of that to get sqrt(0.25416666666667) = 0.5041494487418

Answer 88

Is that it ? for my problem ?

Answer 89

yeah I'm showing you how to find the variance and standard deviation

Answer 90

whats my varicance

Answer 91

that would be 0.25416666666667 and I showed how you find it above

Answer 92

Identify the type of sampling method used.

A trucking company places their office phone number on the back of all of their vehicles to receive comments on how well their employees are driving.

Answer 93

i have 4 more thank you sooo much

Answer 94

@jim_thompson5910

Answer 95

what are your choices for this one

Answer 96

there are no choices

Answer 97

hmm not sure