Use the table to answer the question.
Studying Online
Girls Boys Row total
Want the option to keep studying online 10 3 13
Don’t want the option to keep studying online 5 7 12
Column total 15 10 25What is the probability of selecting a student who wants the option to keep studying online? Write your answer in percent form.
(1 point)
The probability of selecting a student who wants the option to keep studying online is 13 out of 25 total students.
So the probability is 13/25 or 0.52.
In percent form, this is 52%.
A money envelope contains five $10 bills, ten $20 bills, and fifteen $50 bills. Sandra randomly selects two bills without returning the first bill. What is the probability of getting a $10 bill then a $50 bill? Write your answer in the simplest form of fraction.(1 point)
First, we need to determine the total number of ways Sandra can choose the two bills without replacement.
Total number of bills = 5 + 10 + 15 = 30.
Sandra can choose the first bill in 30 ways.
After the first bill is removed, the total number of bills remaining is 29.
The probability of selecting a $10 bill first is 5/30 = 1/6.
After selecting the $10 bill, the probability of selecting a $50 bill is 15/29.
Therefore, the probability of getting a $10 bill first and then a $50 bill is (1/6) * (15/29) = 15/174.
So, the probability of getting a $10 bill first and then a $50 bill is 15/174 in its simplest form.