15.A box contains five red balls, three green balls, and two yellow balls. Suppose you select one ball at random from the box and do not replace it. Then you randomly select a second ball. Find the probability that both balls selected are red.
16. In a certain region, the probability of flooding in any one year is 1/4. What is the probability that it does NOT flood at all over the next five years?
17. Consider the following scores on a ten-point exam: 4, 7, 9, 6, 7, 2, 6, 3, 8, 7, 5, 3, 5, 8, 4, 4
(a) Construct a frequency distribution.
(b) Construct a histogram.
(c) Construct a frequency polygon.
18. Consider the following 30 scores from a 100-point exam: 79, 51, 67, 50, 78, 62, 79, 83, 73, 80, 88, 48, 60, 71, 79, 89, 63, 55, 93, 71, 41, 81, 46, 50, 61, 59, 50, 80, 75, 61
(a) Construct a stem-and-leaf display.
(b) Construct a grouped frequency distribution with classes 40-49, 50-59, etc.
(c) Construct a grouped histogram for the frequency distribution
15.A box contains five red balls, three green balls, and two yellow balls. Suppose you select...
1. One box contains seven red balls and three green balls, and a second box contains six red balls and four green balls. A ball is randomly selected chosen from the first box and placed in the second box. Then a ball is randomly selected from the second box and placed in the first box. a. What is the probability that a red ball is selected from the first box and a red ball is selected from the second box?...
1 One box contains seven red balls and three green balls, and a second box contains six red balls and four green balls. A ball is randomly selected chosen from the first box and placed in the second box. Then a ball is randomly selected from the second box and placed in the first box. a. What is the probability that a red ball is selected from the first box and a red ball is selected from the second box?...
A box contains seven red balls and five black balls. Three balls are selected at random from the box. Compute the probability that (d) at least one ball is red.
An urn contains 3 red balls and 7 yellow balls. Suppose we select two balls from the urn without replacement. A. Referring to no replacement, find the probability that one ball is red and one ball is yellow B. Referring to no replacement, find the probability that the first ball is yellow or the second ball is yellow
A box contains one yellow, two red, and three green balls. Two balls are randomly chosen without replacement. Define the following events A: One of the balls is yellow B: At least one ball is red h C: Both balls are green D:Both balls are of the same color ) Find the following conditional probabilities: (a) P(BA)- b) P(DB)- (c) P(DIC)-
IA Box 1 contains 5 red and 4 green balls and box 2 contains 4 red and 6 green balls. Three balls are randomly drawn from box 1 and placed in box 2. Then a ball is taken from box 2. If the ball taken from box 2 is found red, find the probability that 2 red and 1 green balls are transferred from box 1 to box 2? IB. Two coins Ci and C2 have a probability of falling...
Q3. A box in a certain supply room contains 15 green balls and 8 red balls. Suppose that four balls are randomly selected without replacement. (a) What is the probability that exactly two of the selected balls are red? (b) What is the probability that at least one of the selected balls are green? (c) Suppose that there are now 15 green balls and 8 red balls and 4 yellow balls. What is the probability that exactly one of the...
A box contains two red balls and three green balls. Make a box model. Six draws are made with replacement from the box. Find the chance that: a) A red ball is never drawn. b) A green ball appears exactly three times. c) A green ball appears at least twice.
An urn contains four red balls, six black balls, and five green balls. If two balls are selected at random without replacement from the urn, what is the probability that a red ball and a black ball will be selected? (Round your answer to three decimal places.)
3. (9 points) A box contains three blue balls and two red balls. Two balls are randomly drawn from the box one after another without replacement. Determine the probability that (a) two drawn balls are both red. (b) one ball is red and one ball is blue. (c) at least one of two drawn balls is blue.