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What is the probability that in a randomly selected sample of 6 people exactly 4 of them are 65 approximately 0.2?
Wiki User
∙ 7y ago
The answer would depend on the Demographics of the population: a probability of 0.2 it too high unless the population is from a retirement area.
Wiki User
∙ 7y ago
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What is the probability that exactly four vehicles will pass the nct test if a recent study reveals that 80 percent of all vehicles passed the nct test a random sample of 6 vehicles is selected?
The probability that exactly 4 out of 6 randomly selected vehicles will pass the test when the pass rate is 80% is approx 0.2458 (or nearly a quarter).
What is the probability of getting exactly 7 out of 12 multiple choice questions right if a student randomly guesses one of the five possible choices for each question?
It is 0.0033
If a 5-member committee is selected from at random from from among 7 faculty and 6 students what is the probability that it contains exactly 3 faculty and 2 students?
1 out of 3600
What is the probability of obtaining exactly two heads in three flips of a coin given that at least one is a head?
The probability of obtaining exactly two heads in three flips of a coin is 0.5x0.5x0.5 (for the probabilities) x3 (for the number of ways it could happen). This is 0.375. However, we are told that at least one is a head, so the probability that we got 3 tails was impossible. This probability is 0.53 or 0.125. To deduct this we need to divide the probability we have by 1-0.125 0.375/(1-0.125) = approximately 0.4286
What is the probability that the 6 child family has exactly two girls?
The probability is 2 - 6
What is the probability that exactly four vehicles will pass the nct test if a recent study reveals that 80 percent of all vehicles passed the nct test a random sample of 6 vehicles is selected?
The probability that exactly 4 out of 6 randomly selected vehicles will pass the test when the pass rate is 80% is approx 0.2458 (or nearly a quarter).
What is the probability of randomly selecting a three-children family with exactly two girs?
It is 3/8.
What is the probability of randomly selecting a four-child family with exactly two boy children?
2/4
What is the probability that 4 randomly selected people all have different birthdays?
Let us assume that there are exactly 365 days in a year and that birthdays are uniformly randomly distributed across those days. First, what is the probability that 2 randomly selected people have different birthdays? The second person's birthday can be any day except the first person's, so the probability is 364/365. What is the probability that 3 people will all have different birthdays? We already know that there is a 364/365 chance that the first two will have different birthdays. The third person must have a birthday that is different from the first two: the probability of this happening is 363/365. We need to multiply the probabilities since the events are independent; the answer for 3 people is thus 364/365 × 363/365. You should now be able to solve it for 4 people.
What is the pobability of randomly selecting a month with 31 days?
The probability is 7:12... There are five months with less than 31 days, so the probability of selecting a month with exactly 31 days is 7 out of 12.
What is the probability of getting exactly 7 out of 12 multiple choice questions right if a student randomly guesses one of the five possible choices for each question?
It is 0.0033
The probability that a standard normal random variable Z is less than 50 is approximately 0?
False. It is approximately 1. Theoretically, it is not 1. I used excel, and I know the probability is between 0.999999 and 1. as the probability of Z<6 is 0.999999. I can't calculate the probability exactly because excel only goes to 7 place accuracy.
If a 5-member committee is selected from at random from from among 7 faculty and 6 students what is the probability that it contains exactly 3 faculty and 2 students?
1 out of 3600
What is the probability that a randomly chosen company report positive profits of 63 percent?
The probability is close to 0. You would need to know details of all the companies in the world that filed reports. Chances of finding one whose profits were exactly 63% are pretty slim!
What is the probability of obtaining exactly two heads in three flips of a coin given that at least one is a head?
The probability of obtaining exactly two heads in three flips of a coin is 0.5x0.5x0.5 (for the probabilities) x3 (for the number of ways it could happen). This is 0.375. However, we are told that at least one is a head, so the probability that we got 3 tails was impossible. This probability is 0.53 or 0.125. To deduct this we need to divide the probability we have by 1-0.125 0.375/(1-0.125) = approximately 0.4286
What is the probability that the 6 child family has exactly two girls?
The probability is 2 - 6
What is the probability of getting exactly 2 heads by flipping 3 coins?
The probability is 0.375
