Question

An urn has 9 balls that are identical except that 6 are white
and 3 are red. A sample of 7 is selected randomly without
replacement.

What is the probability that exactly 5 are white and 2 are
red?

What is the probability that at least 5 of the balls are
white?

Answer #1

An urn has 6 balls that are identical except that 3 are white
and 3 are red. A sample of 4 is selected randomly without
replacement. A) What is the probability that exactly 2 are white
and 2 are red? B) What is the probability that at least 2 of the
balls are white?

An urn has 16 balls that are identical except that 8 are white
and 8 are red. A sample of 9 is selected randomly without
replacement.
What is the probability that exactly 7 are white and 2 are
red?
What is the probability that at least 7 of the balls are
white?

an urn has 22 balls that are identical except that 7 are
white, 8 are red, and 7 are blue. what is the probability that all
are white if 4 are selected randomly without replacement?

An urn contains 1 white, 2 black, 3 red, and 4 green balls. If 6
balls are selected randomly (without replacement) and X represents
the number of selections that are either red or green, find: (a)
the probability mass function for X. (b) the expected value of X
(calculate this value directly by using the probability mass
function from part a).

An urn has 6 red and 4 white balls. Two balls are chosen at
random and without replacement.
Let Y be the number of red balls among those selected.
a. Find the probability function (pmf) of Y.
b. Find the moment-generating function of Y.

An urn contains 3 white balls and 7 red balls. A second urn
contains 7 white balls and 3 red balls. An urn is selected, and the
probability of selecting the first urn is 0.2. A ball is drawn from
the selected urn and replaced. Then another ball is drawn and
replaced from the same urn. If both balls are white, what are the
following probabilities? (Round your answers to three decimal
places.)
(a) the probability that the urn selected...

Urn A has 17 white and 4 red balls. Urn B has 9 white and 13 red
balls. We flip a fair coin. If the outcome is heads, then a ball
from urn A is selected, whereas if the outcome is tails, then a
ball from urn B is selected. Suppose that a red ball is selected.
What is the probability that the coin landed heads? n

Suppose you have an urn with 20 balls including 10 red, 6 white
and 4 black. We randomly select 5 balls with replacement. What is
the probability that at least one of the 5 selected balls is red
?
Select one:
a. 0.031250 b. 0.968750 c. 0.000320 d. 0.500000 e. 0.999680

An urn contains two red balls and three white balls.
If a ball is chosen at random, what is the probability that it
is white?
Group of answer choices
0
1
2/5
1/5
3/5
An urn contains two red balls and three white balls.
Suppose two balls are drawn randomly. What is the probability
that both will be white?
Group of answer choices
1/10
3/20
6/20
9/20
9/25

An urn has 12 balls. 8 are white balls and 4 are black
balls.
If we draw a sample of 3 balls (i.e., picking without
replacement) and given that the first two balls selected were a
black ball and a white ball, what is the conditional probability of
the third ball drawn being white?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 19 minutes ago

asked 27 minutes ago

asked 36 minutes ago

asked 51 minutes ago

asked 55 minutes ago

asked 55 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago