In roulette, a steel ball is rolled into a wheel that contains 18 red, 18 black and 2 green slots. If the ball is rolled 25 times, find the probabilities of the following events.

a) The ball falls into the green slots two or more times

b) The ball does not fall into any green slots

c) The ball falls into black slots 15 or more times

d) The ball falls into red slots 10 or fewer times

a) so n = 25 .. p = 2/38 and i calculated for x = 0 and x = 1 and added them up and subtracted it from 100% to get 71%.

b) 36/38 = 95%

Am i doing this right?

Can someone help me with c and d, thank you