A binomial experiment with probability of success p=0.32 and n=11 trials is conducted. What is the probability that the experiment results in 1 or fewer successes?2 points0.0890.0930.0970.101
Question
A binomial experiment with probability of success p=0.32 and n=11 trials is conducted. What is the probability that the experiment results in 1 or fewer successes?2 points0.0890.0930.0970.101
Solution
To solve this problem, we need to use the formula for the binomial probability, which is:
P(X=k) = C(n, k) * (p^k) * ((1-p)^(n-k))
where:
- P(X=k) is the probability of k successes in n trials
- C(n, k) is the combination of n items taken k at a time
- p is the probability of success
- n is the number of trials
We want to find the probability of 1 or fewer successes, so we need to calculate P(X=0) and P(X=1), and then add these two probabilities together.
-
Calculate P(X=0):
- C(11, 0) = 1 (since there's only one way to have no successes)
- p^0 = 1 (any number to the power of 0 is 1)
- (1-p)^11 = (1-0.32)^11 = 0.68^11 = 0.00057 (approximately)
- So, P(X=0) = 1 * 1 * 0.00057 = 0.00057
-
Calculate P(X=1):
- C(11, 1) = 11 (since there are 11 ways to have one success)
- p^1 = 0.32
- (1-p)^10 = (1-0.32)^10 = 0.68^10 = 0.00168 (approximately)
- So, P(X=1) = 11 * 0.32 * 0.00168 = 0.00594
-
Add P(X=0) and P(X=1) together:
- P(X<=1) = P(X=0) + P(X=1) = 0.00057 + 0.00594 = 0.00651
So, the probability that the experiment results in 1 or fewer successes is approximately 0.00651. This is not one of the options given, so there may be a mistake in the problem or in the options provided.
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