answersLogoWhite

0


Best Answer

1 out of 20

this is because there are 20 numbers in total, and there is only one 7 in there. (Assuming that there is the same probability for each number to be chosen, and that 17 is excluded as an affirmative outcome)

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: If a number from 1 to 20 is chosen what is the probability of getting 7?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Statistics

If a number is chosen at random from the numbers 1 to 20 inclusive what is the probability a prime will be picked?

There are 8 out of 20 numbers that are prime, so 8/20, or 2/5.


What is the probability of picking a prime number from numbers between 1 and 20?

The probability is 8/20.


Only 7.2 percent of the population has O-negative blood A mobile blood center is visited by 20 donors in afternoon Let X denote number of universal donors among them probability that X is at least 2?

The probability that any given donor is a universal donor is 0.072.We need the probability that the number of universal donors in this group of 20 is not zero or one.Probability of getting zero universal donors: ( 1 - 0.072 )^20 = 0.224367Probability of getting one such donor: 0.348156 (given by the binomial probability density function: probability of one success in 20 trials with p=0.072)Total: 0.224367 + 0.348156 = 0.572523, the probability of zero or one donorsBut we want 1 - 0.572523 = 0.427477, the probability of getting two or more such donors.^ stands for 'to the power of'


What is the probability of getting five questions correct on a 20 question multiple choice test?

The answer depends on the number of choices available for each question.


On a math test 5 out of 20 students got an A If three students are chosen at random what is the probability that all three got an A on the test?

P( a student getting an A) = 5/20=1/4 There are 3 students. The probability that all three got an A is (1/4)(1/4)(1/4)=1/64.

Related questions

What is the probability of getting a prime number from 1 to 20?

40%


What is the theoretical probability of getting a prime number if you randomly pick a number from 20 through 39?

There are 20 numbers from 20 through 39, and 4 of them are prime (23, 29, 31, 37), the probability is 4 in 20 or 0.20.


If a number is chosen at random from the numbers 1 to 20 inclusive what is the probability a prime will be picked?

There are 8 out of 20 numbers that are prime, so 8/20, or 2/5.


A number is chosen at random from the first 20 positive whole numbers What is the probability that it is not a prime number?

There are 12 composite (and 8 primes) in the first twenty whole numbers. So the probability of randomly choosing a non-prime is 12/20 or 60%.


Was the outcome of getting heads or tails in the 20 tosses same as the probability ratio?

It depends on what variable the probability ratio was for! The random variable could have been the number of heads minus the number of tails, for example.


What is the probability of picking a prime number from numbers between 1 and 20?

The probability is 8/20.


Is 20 a probability?

No, a probability must needs be a number between 0 and 1.20% might be a probability, though - since that is equivalent to 0.2.


Toss a coin-randomly select a number from 0 to 9 What is the probability of getting tails and selecting a 0?

The result of tossing the coin would not affect which number was selected. So we say that these two events are independent. We can therefore assess the probability of each of them separately and then multiply the two probabilities together for a final result. Probability of getting tails: 1/2 (since there is one way of getting heads out of two possibilities) Probability of getting zero: 1/10 (since there is one way of getting zero out of ten possibilities) Overall probability: 1/2 x 1/20 = 1/20


Only 7.2 percent of the population has O-negative blood A mobile blood center is visited by 20 donors in afternoon Let X denote number of universal donors among them probability that X is at least 2?

The probability that any given donor is a universal donor is 0.072.We need the probability that the number of universal donors in this group of 20 is not zero or one.Probability of getting zero universal donors: ( 1 - 0.072 )^20 = 0.224367Probability of getting one such donor: 0.348156 (given by the binomial probability density function: probability of one success in 20 trials with p=0.072)Total: 0.224367 + 0.348156 = 0.572523, the probability of zero or one donorsBut we want 1 - 0.572523 = 0.427477, the probability of getting two or more such donors.^ stands for 'to the power of'


What is the probability of getting five questions correct on a 20 question multiple choice test?

The answer depends on the number of choices available for each question.


On a math test 5 out of 20 students got an A If three students are chosen at random what is the probability that all three got an A on the test?

P( a student getting an A) = 5/20=1/4 There are 3 students. The probability that all three got an A is (1/4)(1/4)(1/4)=1/64.


What is the probability of picking up number 15 from 1 to 20 numbers?

The probability, in a single random selection, is 1/20 or 0.05