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There are 200 balls there are 100 white balls 55 red balls 45 black balls if a student randomly picks up a ball what's the the probability that he picks up a red ball?
Wiki User
∙ 8y ago
The probability is: 55/200 or 11/40
Wiki User
∙ 8y ago
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If a bag1 have 12 balls including 4 black balls and bag2 have 12 balls including 2 black ball how many black ball need to put in bag2 to make same probability of both bag?
The probability of a black ball in bag 1 is 4/12 = 1/3. If you add 3 black balls to bag 2, it will contain 5 black balls out of 15: the probability of a black ball being 3/15 = 1/3.
A box contains 7 red balls and 11 black balls two balls are taken out one after the other without replacement what is the probability that both balls are black?
11/18 x 10/17 = .359
What is the probability as a percent of randomly selecting a white marble from a jar containing 8 black and 8 white?
50%
When an urn contains 12 red balls 153 blue balls 2 black balls 47 white balls and no green balls What is the probability you do not draw any ball at all?
2
Imagine an ordinary deck of 52 cards if you randomly draw one card from the deck what is the probability that it is a black card?
50%
If A box contains three black balls and four gold balls Two balls are randomly drawn in succession from the box If there is no replacement what is the probability that both balls are black?
(3/7)*(2/7)=(6/49) You have a 6 out of 49 probability.
A bag containing 4 green 6 black 7 white balls a ball is drawn at randomly probability of finding 2 red balls?
The probability is zero, because there are no red balls in the bag.
If a bag1 have 12 balls including 4 black balls and bag2 have 12 balls including 2 black ball how many black ball need to put in bag2 to make same probability of both bag?
The probability of a black ball in bag 1 is 4/12 = 1/3. If you add 3 black balls to bag 2, it will contain 5 black balls out of 15: the probability of a black ball being 3/15 = 1/3.
What is the probability of choosing 3 red balls and 2 black balls out of a bag which contains 5 red balls 2 green balls and 4 black balls?
If you draw enough balls, without replacement, the probability is 1.The answer depends onhow many balls are drawn, andwhether or not they are replaced.Unfortunately, your question gives no information on these matters.
If you randomly select a card from a deck of 52 cards what is the probability of selecting a black ace?
1/26
A box contains 7 red balls and 11 black balls two balls are taken out one after the other without replacement what is the probability that both balls are black?
11/18 x 10/17 = .359
What is the probability of pulling a black ball and then a green ball if there are 3 red balls 3 green balls 3 blue balls and 3 black balls?
3/12*3/11 = 9/132, or 6.818%.
What is the probability as a percent of randomly selecting a white marble from a jar containing 8 black and 8 white?
50%
When an urn contains 12 red balls 153 blue balls 2 black balls 47 white balls and no green balls What is the probability you do not draw any ball at all?
2
Imagine an ordinary deck of 52 cards if you randomly draw one card from the deck what is the probability that it is a black card?
50%
If a bag contains 4 black 6 green and 2 yellow marbles and one marble is randomly drawn what is the probability that it is not black?
There are 8 marbles that aren't black, out of a total of 12 marbles, so the probability is 8/12 or 2/3.
What is the probability of drawing two black kings from a standard deck of 52 cards?
The probability depends on:whether the cards are drawn randomly,how many cards are drawn, andwhether the cards are replaced before drawing the next card.If only 2 cards are drawn randomly, and without replacement, the probability is 0.00075 approximately.
