Posted by omar on Wednesday, January 16, 2013 at 12:33pm.
50 red cars and 30 white and 20 blue what is the probability of 2 cars from the same colors ?

math  T.J And the Vibe, Wednesday, January 16, 2013 at 12:42pm
The probability would be red because it has the most cars

math  KeeKee, Wednesday, January 16, 2013 at 12:44pm
10

math  Reiny, Wednesday, January 16, 2013 at 4:50pm
Your question is incomplete.
Are you choosing 2 cars ? It doesn't say.
Assume we are choosing 2 cars and you want the prob that they are both of the same colour.
The could be RR or WW or BB
prob(RR) = C(50,2)/C(100,2) = 1225/4950 = 49/198
prob(WW) = C(30,2)/C(100,2) = 435/4950 = 29/330
prob(BB) = C(20,2)/C(100,2) = 190/4950 = 19/495
sum of those = 37/99
prob of same colour = 37/99
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