What is the probability of drawing a black ball?
c) a black ball Therefore the probability of getting a black ball is 1/5.
What is the probability of choosing a vowel from the word probability?
4/11
The probability that the selected letter is a vowel is. Therefore, the probability that the selected letter is a vowel = 4/11.
What is the probability that the ball is black and white?
Therefore the probability of getting a red ball or a black ball is 13/20. Therefore the probability of getting a red ball or a white ball is 4/5. Therefore the probability of getting a black ball or a white ball is 11/20.
What is the probability that both the balls have the same colour?
A bag contains 5 black balls and 3 white balls. Two balls are drawn at random, one after another from the bag without replacement. What the probability that both of the balls have the same colour? The answer depends on which color is picked two times. Let’s solve for black first. There is a 5 8 chance that a black marble will be chosen.
How many white and 3 black balls are there in a bag?
After the first ball is drawn, there are 5 white and 2 black balls in the bag. ⇒ The probability of drawing a black ball is 2 7. ⇒ The probability that both the ball drawn are black is 3 8 × 2 7 = 3 28. Originally Answered: There are 5 white and 3 black balls in a bag. Two balls are randomly taken out without replacing them.
How do you find the probability of a black ball being black?
To calculate the probability, we take the probability of the first ball being black (3 black balls in the bag, 8 balls total, so 3 8) and multiply this by the probability of the second ball being black if the first one is black (now 2 black balls in the bag and 7 total balls, so 2 7 ). Then: 3 8 ⋅ 2 7 = 6 56 = 3 28.
What is the probability of drawing a white ball first time?
The probability of drawing a white ball on the first time is 3 5. As the ball is not replaced is we now have 9 balls of which 5 are white, so the probability you draw a white ball given the first is white is 5 9. To find the probability that you draw two whites is 3 5 × 5 9 or 1 3. The probability of drawing a black ball on the first time is 2 5.
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