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TSI Math: Adding Probabilities 47 Views
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Description:
A bag contains 12 grape candies, 7 apple candies, 10 strawberry candies, and 11 lemon candies. Nikki takes one candy from the bag, and then a second. What is the probability that she withdraws both an apple and a lemon candy, in either order?
- Data Analysis, Statistics, and Probability / Probabilistic Reasoning
- Data Analysis, Statistics, and Probability / Probabilistic Reasoning
- TSI Math / Data Analysis, Statistics, and Probability
- Test Prep / TSI
- TSI Mathematics / Data Analysis, Statistics, and Probability
- TSI / TSI Math
- TSI / TSI Mathematics
- Test Prep / TSI
Transcript
- 00:01
Okay sy mash bumpers Next up a bag contains twelve
- 00:05
grape candy seven applicant he's ten strawberry candies and eleven
- 00:09
lemon candies Nicky takes one candy from the bag and
- 00:12
then a second what's the probability that she withdraws both
- 00:16
an apple and a lemon candy in either order No
Full Transcript
- 00:24
okay nikki could either taken apple candy first and a
- 00:27
lemon candy second or a lemon candy first an apple
- 00:30
candy second right Either way probability and fruit candy make
- 00:33
a very fun paring right before nikki reaches into the
- 00:37
bag There are a total of twelve plus seven plus
- 00:38
ten plus eleven forty candies in the bag The probability
- 00:42
of taking an apple candy first is seven out of
- 00:45
forty because well seven out of the forty candies in
- 00:47
the bag or apple flavored Now there are only thirty
- 00:50
nine candies left in the bag so the probability gets
- 00:53
all wonky here Probability of taking one of the eleven
- 00:57
candies next is eleven out of thirty nine Well multiply
- 01:00
the individual probabilities together to find the total probability of
- 01:02
taking an apple candy first and a lemon candy seconds
- 01:05
We've got to calculate this whole thing first that seven
- 01:08
times eleven at seventy seven over whatever forty times thirty
- 01:11
nine years and the total there is point Oh for
- 01:14
nine force about five percent Okay great job so far
- 01:17
Using the same reasoning is before we find the probability
- 01:20
of taking a lemon candy first which is eleven Out
- 01:22
of forty all right we've removed one candy from the
- 01:24
bags of the probability of taking an apple candy Second
- 01:27
is seven out of thirty nine Well now he multiplied
- 01:29
those two probabilities together to find the total probability of
- 01:32
taking a lemon candy and then an apple candy and
- 01:34
we get eleven over forty times seven over thirty nine
- 01:37
And guess what It's still point Oh four nine four
- 01:40
Note that apple then lemon and lemon than apple have
- 01:44
the same probability Will the total probability of either one
- 01:47
of these two sequences of events occurring is the sum
- 01:51
of their probabilities We're goingto adam up so it's about
- 01:53
nine point eight percent They're rounded to match the answer
- 01:56
choices while the probability of taking both an apple and
- 01:59
a lemon candy then and either order is point Oh
- 02:02
nine nine yeah mingo nif isn't so that's it The 00:02:06.102 --> [endTime] answer is b and we're shmoop this
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