The probability that: two are white and one is blue. A box contains identical balls of which 12 are red, 16 white and 8 blue. Three balls are drawn from the box one after the other without replacement. Find the probability that: two are white and one is blue. Please I need working and explaination. 
Re: The probability that: two are white and one is blue. In the numerator, we will have the product and in the denominator . There are 3 distinct ways to order the balls, hence: 
Re: The probability that: two are white and one is blue. Yes you are right. That is the answer. Just give me a clue on how you know the number of orders, for example, this one is in this order P(wwb) + P(bww) + P(wbw) i.e 3 orders. How do you know the one that should be in two, three or six orders? 
Re: The probability that: two are white and one is blue. The way I looked at it, there are three positions the one blue ball may occupy. 
Re: The probability that: two are white and one is blue. Alright! Thank you for the help. 
Re: The probability that: two are white and one is blue. Hello, Chikis! Another approach . . . Quote:

Re: The probability that: two are white and one is blue. A box contains identical balls of which 12 are red, 16 white and 8 blue. Three balls are drawn from the box one after the other without replacement. Find the probability that: two are white and one is blue. possible combination WWB + WBW + BWW = 16/36 * 15/35 * 8/34 + 16/36 * 8/35 * 15/34 + 8/36 * 16/35 * 15/34 = 16/119 
Re: The probability that: two are white and one is blue. Ahhh....I see...you're doing this to SNEAK IN your advertizing :shock: 
Re: The probability that: two are white and one is blue. Quote:
It's great that you want to help, but please do so without spamming each post with a link. Thank you for your cooperation. :mrgreen: 
Re: The probability that: two are white and one is blue. thanks, i remember next time......... 
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