Table of Contents
- 1 What is the probability that the ball drawn is black?
- 2 What is the probability that the second ball is red without replacement?
- 3 What is the probability of drawing a white ball containing 3 black balls and 4 white balls?
- 4 How many balls can be drawn from a bag?
- 5 How many balls are drawn sequentially from the box?
What is the probability that the ball drawn is black?
1/4
If one ball is drawn at random from the box, the probability that it will be a black ball is 1/4.
What is the probability that the second ball is red without replacement?
21 out of 36
We can round this to three decimal places, giving us an answer of 0.417. At this stage, it is worth completing the remainder of the tree diagram. If the first ball selected is red, the probability that the second ball is also red is 21 out of 36, as 21 of the remaining balls are red.
What is the probability of drawing a white ball containing 3 black balls and 4 white balls?
4/7
Two balls are drawn one by one at random without replacement. The probability that the second drawn ball is white. Therefore, the probability that the second drawn ball is white = (2/7) + (2/7) = 4/7.
How many red and black balls are there in bag 2?
Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5 black balls. Two balls are transferred at random from Bag I to Bag II and then a ball is drawn from Bag II. The ball so drawn is found to be red in colour. Find the probability that the transferred balls were both black
What is the probability of drawing a black ball from two bags?
The first bag contains 8 balls (3 red & 5 black) while the second bag contains 10 balls (6 red &4 black). Probability of drawing a black ball from first bag is 5/8 while that of drawing a black ball from second is 4/10. Hence, the required probability is 5/8 x 4/10 = 1/4.
How many balls can be drawn from a bag?
A bag contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the bag, if at least one black ball is to be included in the draw 64 128 132
How many balls are drawn sequentially from the box?
Two balls are drawn sequentially and without replacement from the box. Two balls are drawn successfully without replacement from a box which contains 4 white balls and 3 red balls. What is the probability that the first ball drawn is white and the second is red?