
The probability of drawing a red marble on the first attempt is

After the first marble is drawn, and we know it to be red, we're drawing the next marble from a pool with one less marble than before (i.e. conditioning on the event

). So

And so
Answer:
A
Step-by-step explanation:
Observe the coordinates of C, it's (5,2). Now observe C' which is (2, - 5). Hence the rule is (x, y) -> (y, - x)
Answer:
2*x^3 + x^2 + x
Step-by-step explanation:
a^b = x
Then,
a^(2b) = a^b*a^b = x* x = x^2
a^(3b) = a^b*a^b*a^b = x*x*x = x^3
2*(a^3b) + (a^2b) + (a^b)
= 2*(x^3) + (x^2) + (x)
= 2*x^3 + x^2 + x