0
In a shop there are 20 customers 18 of whom will make a purchase If three customers are selected one at a time at random what is the probability that all will make a purchase?
Wiki User
∙ 14y ago
18/20 x 17/19 x 16/18 = 4896/6840, or around 71.6%.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Alternate Wordings for 'In a shop there are 20 customers 18 of whom will make a purchase. If three customers are selected one at a time at random what is the probability that all will make a purchase?
Here is another way to phrase the question: If 18 out of 20 customers make a purchase in a shop, and three customers are selected at random, what is the probablity that all will make a purchase? Each random customer has a 18/20 chance of being one that purchased, so the probability that all three make a purchase is 18/20*18/20*18/20=.729
What is probability that a leap years selected at random will contain 53 Sundays?
probability = 2/7 to be exact, 28/97 (about 28.87%)
Twenty percent of students smoke what is the probability that a random group of seven is selected and four of them smoke?
Approx 0.0287
An integer between 1 and 30 all inclusive is selected at random what is the probability that the integer selected is a multipleof 5?
6 out of 30 ie 20% or 0.2
In a classroom the students are 11 boys and 1 girl if one student is selected at random find the probability that the student is a girl?
There is only one girl out of 12 students so the probability that the girl is selected is 1/12.
Alternate Wordings for 'In a shop there are 20 customers 18 of whom will make a purchase. If three customers are selected one at a time at random what is the probability that all will make a purchase?
Here is another way to phrase the question: If 18 out of 20 customers make a purchase in a shop, and three customers are selected at random, what is the probablity that all will make a purchase? Each random customer has a 18/20 chance of being one that purchased, so the probability that all three make a purchase is 18/20*18/20*18/20=.729
What is the probability for a student in a dormitory to be selected if 10 percent of the students live in dormitories and a random sample of 100 is selected?
The probability is 10 percent.
What is the probability that two people selected at random have the same birthday?
1/365 = 0.00274
What is the probability the random variable will assume a value between 40 and 60?
It depends on what the random variable is, what its domain is, what its probability distribution function is. The probability that a randomly selected random variable has a value between 40 and 60 is probably quite close to zero.
What is probability that a leap years selected at random will contain 53 Sundays?
probability = 2/7 to be exact, 28/97 (about 28.87%)
Sixty percent of the customers of a fast food chain order a hamburger french fries and a drink If a random sample of 15 cash register receipts is selected what is the probability that 10 or more wi?
.4032
Sample selected in such a way that each member of the population has an equal probability of being included?
random sample
How does sampling becomes random?
When each member of the population has the same probability of being selected as a member of the sample.
Approximately 10 percent of people are left-handed If two people are selected at random what is the probability that both are right handed?
The probability is approx 0.81
What sample selected in such a way that each member of the population has an equal probability of being included?
It is a simple random sample.
What is a sample selected in a such a way that each member of the population has an equal probability of being included?
This is called a random sample.
When every Member of a population has the chance of being selected based on probability what type of sampling is this?
Simple random sampling.
