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A bag contain 4 green 6 black 7 white balls a ball is drawn at random what is the probability that it is a green or a black ball?
Wiki User
∙ 14y ago
This is a law of addition probability which states that the probability of A or B equals the probability of A plus the probability of B minus the probability of A and B. Written in mathematical terms, the equation is: P(AorB) = P(A) + P(B) - P(AnB) where P(AnB) = 0 (since you can not pull out a green and black ball at the same time). Let P(A) = Probability of drawing the green ball & let P(B) = Probability of drawing the black ball. Total outcomes is 17. So, P(A) = 4/17 & P(B) = 6/17. Therefore P(green or black) = 4/17 + 6/17 = 10/17.
Wiki User
∙ 14y 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.
What is the probability of picking a black ace?
The probability of picking a black ace in one random draw from a normal pack of playing cards is 1/26.
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?
The probability is: 55/200 or 11/40
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
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
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.
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.
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.
What is the probability of picking a black ace?
The probability of picking a black ace in one random draw from a normal pack of playing cards is 1/26.
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.
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?
The probability is: 55/200 or 11/40
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%.
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
What is the probability of getting a black 4 out of a 52 deck of cards?
If you pick enough cards, without replacement, the probability is 1. The probability for a single random draw is 1/26.
A bag contains 7 red 5 blue 4 white and 4 black balls find the probability that a ball drawn at random is red or white?
It is (7+4)/(7+5+4+4) = 11/20
Suppose one in every four cars is black and black SUVs amount to one tenth of all cars What is the probability that a black car picked at random is an SUV?
Suppose there are only 20 cars in the world: 5 will be black and 2 will be black SUVs, so if you pick a black car at random there are 2 chances out of 5 that it will be an SUV, ie probability of 0.4 or 40%
