Question

A box contains 8 red and 5 white balls. 8 balls are selected at random, without replacement. Find the probability that 3 white balls are selected.

Answer #1

any query, please ask

Exercise 2 A box contains 3 white balls, 4 red balls and 5 black
balls. A ball is picked, its color recorded and returned to the
box(with replacement). Another ball is then selected and its color
recorded.
1. Find the probability that 2 black balls are selected.
2. Find the probability that 2 balls of the same color are
selected.
Now 4 balls are picked with replacement
3.Find the probability no red balls are selected.
4.Find the probability that the...

A box contains 10 red balls, 10 white balls, and 10 blue balls.
Five balls are selected at random, without replacement. Let X be
the number of colors will be missing from the selection. Determine
the probability mass function of X.

For this problem, assume the box contains 8 blue balls, 5 red
balls, and 4 white balls, and that we choose two balls at random
from the box.
What is the probability of neither being blue given that neither
is red?

In a box of 6 red and 4 green balls, 3 balls are selected at
random without replacement. Find the probability distribution of
the number of red balls. *

A box contains "r" red balls, "w" white balls, and "b" blue
balls. Suppose that balls are drawn from the box one at a time, at
random, without replacement. What is the probability that all "r"
red balls will be obtained before any white balls are obtained?
The answer is (r!)(w!)/(r+w)! Can anyone explain why please?

Box I contains 7 red and 3 black balls; Box II contains 4 red
and 5 black balls. After a randomly selected ball is transferred
from Box I to Box II, 2 balls are drawn from Box II without
replacement. Given that the two balls are red, what is the
probability a black ball was transferred?

A jar contains 30 red balls and 20 white balls. Twenty-five
balls are randomly selected from the jar with replacement. What is
the probability that a red ball was selected more than 20
times?
Answer: (The answer was wrong)
0.009
A jar contains 30 red balls and 20 white balls. Twenty-five
balls are randomly selected from the jar without replacement. What
is the probability that the selection contains more than 20 red
balls?
Answer: (The answer was wrong)
0.0006

Box 1 contains 4 red balls, 5 green balls and 1 yellow ball.
Box 2 contains 3 red balls, 5 green balls and 2 yellow
balls.
Box 3 contains 2 red balls, 5 green balls and 3 yellow
balls.
Box 4 contains 1 red ball, 5 green balls and 4 yellow balls.
Which of the following variables have a binomial
distribution?
(I) Randomly select three balls from Box 1 with replacement. X =
number of red balls selected
(II) Randomly...

A box contains
22
red,
22
white and
33
green balls. Two balls are drawn out of the box in succession
without replacement. What is the probability that both balls are
the same color?

A bowl contains 4 red, 5 blue and 6 white balls. If 4 balls are
taken at random with replacement, find the probability of
having
4 blue balls
4 white balls
2 red balls
3 blue balls
2 red, 1 blue, and 1 white balls

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