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Amanda [17]
3 years ago
5

8)An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probabilitythat there is at le

ast one correct answer.A)0.100B)0.900C)0.001D)0.999
Mathematics
1 answer:
nikdorinn [45]3 years ago
5 0

Answer:

D.) 0.9990

Step-by-step explanation:

Given :

Number of questions = 10

True or False questions ; probability of success, p = 1/2 = 0.5

Using binomial distribution :

P(x =x) = nCx * p^x * (1 - p)^(n - x)

Probability of getting atleast one correct answer :

P(x ≥ 1) = p(1) + p(2) +... P(x = 10)

Using a binomial probability calculator :

P(x ≥ 1) = 0.9990

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