Use a binomial probability formula or use a binomial probability table.
Formula:
P(x) = (nCx)(p^x)[q^(n-x)]
P(1) = (3C1)(.8^1)(.2^2)
I'll let you finish the calculation.
If you use the table, p = .8 (for 80%), n = 3 (sample size), x = 1.
(Note: q in the formula is 1-p or .2).
I hope this will help.
A company markets educational software products, and is ready to place three new products on the market. Past experience has shown that for this particular software, the chance of "success" is 80%. Assume that the probability of success is independent for each product. What is the probability that exactly 1 of the 3 products is successful?
3 answers
6.36
.096
1 answer