Need help me please don't know this
2 answers:
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Answer:
(a) 0.32
(b) 0.68
Step-by-step explanation:
It is given that a binomial experiment is carried out.
n = 4 trials
Probability of success, p = 0.25
We know that in a binomial experiment:
Probability of success + Probability of failure = 1
p + q = 1
So, q = 1 - 0.25 = 0.75
Probability of 'r' number of successes in 'n' trials of a binomial experiment is given as:
(a) P(r = 0) = ?
Putting values of x = 0, p and q:
(b) Find P(r ≥ 1) = ?
<em>Using complement rule:</em>
<em>P(r =0 ) + P(r ≥ 1) = 1</em>
0.32 + P(r ≥ 1) = 1
P(r ≥ 1) = 1 - 0.32
P(r ≥ 1) = 0.68
So, the answer are:
(a) 0.32
(b) 0.68