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April 20, 2014

April 20, 2014

Posted by **omar** on Wednesday, January 16, 2013 at 12:33pm.

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

- math -
**KeeKee**, Wednesday, January 16, 2013 at 12:44pm10

- math -
**Reiny**, Wednesday, January 16, 2013 at 4:50pmYour 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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