Two balls are drawn from a bag containing 3 red, 4 white and 5 black identical balls. Find the probability that they are all of the same colour.
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Answer:Zero
Step-by-step explanation:
Answered by
1
Answer:
Step-by-step explanation:
3 balls could be either white,black,red.
Probablity of 3 balls to white = 5c3/15c3
Probability of 3 balls to be black = 4c3/15c3
Probability of 3 balls to be red = 6c3/15c3
Probability that all 3 balls are of one colors = p1 + p2 + p3
P = (5c3 + 4c3 + 15c3)/15c3
P = 144/{(15*14*13)/(3*2)}
P =144/455
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