Q. What is three more than three times a number?
The sum of a number and three is six. Three more than three times a number is six.
Q. What is probability of A and B?
The probability of A and B means that we want to know the probability of two events happening at the same time. Formula for the probability of A and B (independent events): p(A and B) = p(A) * p(B). If the probability of one event doesn’t affect the other, you have an independent event.
Q. How do you calculate probability or?
Probability OR: Calculations The formula to calculate the “or” probability of two events A and B is this: P(A OR B) = P(A) + P(B) – P(A AND B).
Q. What is the probability that at least one?
To find the probability of at least one of something, calculate the probability of none and then subtract that result from 1. That is, P(at least one) = 1 – P(none).
Q. How do you find the probability of at least two successes?
The probability of getting FEWER THAN 2 successes is indicated by P(X < 2); the probability of getting AT MOST 2 successes is indicated by P(X < 2); the probability of getting AT LEAST 2 successes is indicated by P(X > 2); the probability of getting MORE THAN 2 successes is indicated by P(X > 2).
Q. What is the probability that a randomly selected student?
The probability that a randomly selected college student will change majors at most once is about 0.406. We can also say that about 40.6% of the time, a randomly selected college student will change majors at most once.
Q. How do you find the probability of a random sample?
From the table, you determine that P(Z > 1.44) = 1 – 0.9251 = 0.0749. So if it’s true that 38 percent of all students taking the exam want math help, then in a random sample of 100 students the probability of finding more than 45 needing math help is approximately 0.0749 (by the Central Limit Theorem).
Q. What is the probability that exactly 2 of the 20 males are color blind?
0.27109
Q. How do you find the probability of a sample between two numbers?
Answer
- μ=μ=8.2σˉx=σ√n=1√60=0.13.
- This allows us to calculate the probability of sample means of a particular distance from the mean, in repeated samples of size 60.
- Let k = the 90th percentile. k=invNorm(0.90,8.2,1√60)=8.37.
- P(8<ˉx<8.5)=normalcdf(8,8.5,8.2,1√60)=0.9293.
Q. Is proportion same as probability?
A proportion implies it is a guaranteed event, whereas a probability is not. Probability is a measure of uncertainty, whereas proportion is a measure of certainty.
