Answer:
The probability of selecting the color of ball that you just selected(a red ball) is 
Step-by-step explanation:
From the question we are told that
The total number of colored balls is n = 10
The number of red balls is r = 2 red
The number of white ball is w = 4
The number of blue balls is b = 4
The number of balls to be selected is N = 2 balls
The cost of playing picking a ball is c = $10
The winnings is 
Here P(A) is the probability of obtaining the exact sequence of result and from the question it is P(A) = 0.10
Generally my price according to the question is

=> 
Let assume we selected a red ball
Generally the probability of selecting a red ball is mathematically represented as

X = 3 that is you x intercept
y = 2 that is your y intercept
Host A: 60+13.25h
Host B: 75+11.5h
60+13.25h =75+11.25h
subtract 11.25h from each side
60+2h = 75
subtract 60 from each side
2h = 15
divide by 2
h = 7.5
at 7.5 hours the two hosts will charge the same
The answer is 350 euros :)
Everyday, she spent 35 euros.
after you subtract the answer is 2x-2y