Use the formula for the conditional probability:

Consider such events
A - a senior takes the bus to school every day;
B - a senior has a driver’s license,
then
,

and

In percent this is nearly 17%.
Answer: correct choice is B.
Answer:

Step-by-step explanation:
As the given algebraic expression is

In order to solve the expression
for x, we have to

Step 1: Subtract 1 from both sides


Step 2: Divide both sides by 3.


Therefore, 
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The answer is choice A, a 3.5% increase.
12/15 = 80%
13/17 = 76.47%
80% - 76.47% = 3.5%
I believe by the first equation they are referring two a representation of the total amount of money made up by the two types of coins. I found this to be 0.05x + 0.10y = 3.50
In my work I solved for the amount of each coin- I assume this is what the final step of your problem entails. If you need any help understanding/ I misinterpreted something please feel free to comment and ask :)
#5c coins or x= 36
#10c coins or y= 17
Answer:
x=10
Step-by-step explanation:
x^2 + 24^2 = 26^2
x^2 + 576 = 676
x^2 = 100
√x^2 = √100
x=10