maria gas a bag with 6 red marbles, 6 blue marbles , and 4 green marbles. without looking, maria picks one marble. she does not replace it, and she picks another one. on the first pick, maria gets a green marble. what is the probability that she gets a red marble on her second pick?

2/3

step-by-step explanation:

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb