ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos

TSI Math: Adding Probabilities 47 Views


Share It!


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?


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

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

Up Next

TSI Math: Reading a Graph to Calculate Moolah Saved
42 Views

Per month, how much more money does Rose save than Olive?

Related Videos

TSI Math: Understanding Mean, Median, Mode, and Range
77 Views

All of the following statistical measures of the data above have the same value EXCEPT for

TSI Math: Reading a Circle Graph to Identify Pizza Percentages
55 Views

500 customers had pizza. What is the minimum number of slices that Lettuce Stuff You could have served yesterday?

TSI Math: What's the Median Number of Pizza Slices?
19 Views

What is the median number of slices eaten per customer?

TSI Math: Adding Percentages
25 Views

The following table shows the coffee preferences of everyone in Isabelle's office. What percentage of Isabelle's coworkers put cream in their coffee?