11 answers
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If the table below represents a probability model based on observed frequencies, what is the value of x?
Y C A R E S
p(y) 0.25 0.18 0.30 0.17 x
A. 0.01
B. 1
C. 0.10
D. 0.20
Bot GPT 3.5
answered
The sum of all probabilities in a probability model must equal 1.
0.25 + 0.18 + 0.30 + 0.17 + x = 1
0.90 + x = 1
x = 0.10
Therefore, the value of x is 0.10, which corresponds to option C.
anonymous
answered
Bowls A and B contain a number of white and red balls. Clark repeatedly selected a ball from both bowls and recorded the results in a table. If there are 500 balls in bowl B, what is the estimated difference in the expected number of white and red balls in bowl B?
A. 50
B. 300
C. 200
D. 100
Bot GPT 3.5
answered
The estimated difference in the expected number of white and red balls in bowl B can be found by looking at the data Clark has recorded in his table. However, since the data from the table is not provided in the question, we cannot determine the exact difference.
Without the data from Clark's table, we do not know how many white or red balls are in bowl A or how many of each color were selected in Clark's sampling. Therefore, we cannot estimate the expected number of white and red balls in bowl B.
Given that, it is not possible to determine which of the answer choices (A, B, C, or D) is correct.
anonymous
answered
Heres Clark's table.
Bowl A- (number of white balls selected) 45- ( number of red balls selected) 55
Bowl B- 60 white balls- 40 red balls
Bot GPT 3.5
answered
In Bowl A, the estimated proportion of white balls is 45 / (45 + 55) = 45 / 100 = 0.45. Similarly, the estimated proportion of red balls in Bowl A is 55 / 100 = 0.55.
In Bowl B, the estimated proportion of white balls is 60 / (60 + 40) = 60 / 100 = 0.6. The estimated proportion of red balls is 40 / 100 = 0.4.
To find the estimated difference in the expected number of white and red balls in Bowl B, we first need to calculate the expected number of white and red balls in Bowl B:
- Expected number of white balls in Bowl B = 0.6 * 500 = 300
- Expected number of red balls in Bowl B = 0.4 * 500 = 200
The difference in the expected number of white and red balls in Bowl B is:
300 (white balls) - 200 (red balls) = 100
Therefore, the estimated difference in the expected number of white and red balls in Bowl B is 100. The correct option is D.
anonymous
answered
What is the probability of rolling and odd number on the first roll of a ix-sided cube and rolling an even number on the second roll?
A. 1
B. 1/2
C. 1/4
D. 2
Bot GPT 3.5
answered
An odd number on a six-sided die would be the numbers 1, 3, or 5, while an even number would be 2, 4, or 6.
The probability of rolling an odd number on the first roll is 3/6 or 1/2. Once an odd number has been rolled, the dice is still a six-sided die and has an equal chance of rolling an even number (3/6 or 1/2).
The probability of rolling an odd number on the first roll and an even number on the second roll is:
1/2 (probability of rolling an odd number on the first roll) * 1/2 (probability of rolling an even number on the second roll) = 1/4
Therefore, the probability of rolling an odd number on the first roll and an even number on the second roll is 1/4, which corresponds to option C.
anonymous
answered
A big flower vase has 5 begonias, 6 carnations, and 7 tulips. Two flowers are randomly selected without replacement. what is the probability two carnations? Express the answer in the simplest form of fraction.
Bot GPT 3.5
answered
The total number of flowers in the vase is 5 + 6 + 7 = 18.
The probability of selecting a carnation on the first draw is 6/18 since there are 6 carnations out of 18 flowers.
After selecting a carnation on the first draw, there are now 5 carnations left out of 17 flowers.
The probability of selecting a carnation on the second draw (without replacement) is 5/17.
To find the probability of selecting two carnations, you multiply the probabilities:
(6/18) * (5/17) = 30/306 = 5/51
Therefore, the probability of selecting two carnations is 5/51.
anonymous
answered
A standard deck of 52 cards contains four suits: hearts, diamonds, clubs, and spades. Each suit has 13 cars: ace, 1, 2, 3, 4, 5, 6, 7, 8, 9, 20, Jack, king, queen. Two cards are randomly drawn without replacement. calculate the probability of drawing two diamond cards. express your answer in percent form rounding to the nearest hundredth
Bot GPT 3.5
answered
To calculate the probability of drawing two diamond cards from a standard deck of 52 cards, we need to determine the number of ways we can draw two diamond cards out of the 13 diamond cards available.
When drawing the first card, the probability of drawing a diamond card is 13/52 (since there are 13 diamond cards out of 52 total cards).
After drawing the first diamond card, there are now 12 remaining diamond cards out of 51 total cards.
The probability of drawing a second diamond card, given that the first card drawn was a diamond, is 12/51.
To calculate the probability of drawing two diamond cards, we multiply the probabilities of each event:
(13/52) * (12/51) = 0.0588
To express this in percent form, we multiply by 100:
0.0588 * 100 = 5.88%
Therefore, the probability of drawing two diamond cards is 5.88%, rounded to the nearest hundredth.