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How can you find the probability of a simple event if the total number equally likely outcomes is 20?
Each outcome has a probability of 0.05
Probability of 20 percent and 50 percent?
20% = 1 out of 5 = 1/5 = a fifth 50% = 1 out of 2 = 1/2 = a halve
20 percent of people who enter store buy something what is the probability of at least one sale?
0 to 20%
What is the probability of at least one event of 20 year frequency occurring in 50 years?
The random variable has a Poisson distribution with parameter L = 1*50/20 = 2.5. So Prob(at least one event in 50 years) = 1 - Prob(No events) = 1 - L0e-L/0! = 1 - e-2.5 = 0.918 approx.
What is the probability that 20 substandard welds will be found out of 300 randomly selected samples knowing that 5 percent will be substandard?
Using the Poisson approximation, the probability is 0.0418
If 20 percent of people who enter store buy something and 3 people enter what is the probability of at least one sale?
The probability of at least one event occurring out of several events is equal to one minus the probability of none of the events occurring. This is a binomial probability problem. Go to any binomial probability table with p=0.2, n=3 and the probability of 0 is 0.512. Therefore, 1-0.512 is 0.488 which is the probability of at least 1 sale.
Probability of rain on monday is what is the probability of no rain on Monday?
IF probability of rain is X percent then probability of no rain is 100- X percent. For example if prob of rain is 80% prob of no rain is 20%
What does it mean to have a probability of 0.05?
It means that there is a probability or chance of 0.05 or 1 in 20 of observing the relevant event.
If the probability of 7 out of 20 equals N percent what does N stand for?
7/20 = NN = 0.35 = 35 percent
How can you find the probability of a simple event if the total number equally likely outcomes is 20?
Each outcome has a probability of 0.05
Probability of 20 percent and 50 percent?
20% = 1 out of 5 = 1/5 = a fifth 50% = 1 out of 2 = 1/2 = a halve
20 percent of people who enter store buy something what is the probability of at least one sale?
0 to 20%
What is the probability of at least one event of 20 year frequency occurring in 50 years?
The random variable has a Poisson distribution with parameter L = 1*50/20 = 2.5. So Prob(at least one event in 50 years) = 1 - Prob(No events) = 1 - L0e-L/0! = 1 - e-2.5 = 0.918 approx.
What is the probability that 20 substandard welds will be found out of 300 randomly selected samples knowing that 5 percent will be substandard?
Using the Poisson approximation, the probability is 0.0418
How many times would a coin have to show heads in 50 tosses to show an experimental probability of 20 percent more than the theoretical probability of getting heads?
Theoretical probability = 0.5 Experimental probability = 20% more = 0.6 In 50 tosses, that would imply 30 heads.
60 percent pass the 1st time and 40 percent fail 2nd time around 80 percent pass and 20 percent fail 3rd time 90 percent pass and 10 percent fail what is the probability you pass on the 2nd time?
Probability of pass on second attempt is 40% x 80% = 32%
Is it possible to toss a coin 20 times and have it land heads up 20 times?
Yes. The probability of this occurring is 0.520 = 0.00000095367 or 1 in 1,048,576 thus you are more likely to do this than win the lottery
