math
posted by kirsten on .
In the game of roulette a ball rolls into one of 37 slots. All the slots are evenly likely. Eighteen of the slots are red, eighteen are white and 1 is green. the ball is rolled 10 times. Calculate the probability of exactly 6 reds? the answer is 0.l94

prob(red) = 18/37
prob(not red) = 19/37
prob 6 reds out of 10
= C(10,6) (18/37)^6 (19/37)^4
= using calculator
= 210(.00092179)
= appr .194