Pearson\'s MyLab & Mastering @ Do Homework. Tyler Fisher Walt Disney Company by

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Pearson's MyLab & Mastering @ Do Homework. Tyler Fisher Walt Disney Company by Taylo >x YouTube NCAA Men's College Baskett × + https://www.mathd.com/Studen homeworkld 467289387&questionld-2;&flushed-faise.; MATHS 125-038 TR 5-6:15pm (Spring 2018) Homework: 11.5 - More Involved Probabilities Score: 0 of 1 pt 11.5.11 Tyler Fisher 3/18/18 5:55 PM Save 4 of 6 (3 complete) HW Score: 50%, 3 of 6 pts Question Help A box contains 11 transistors, 3 of which are defective. If 3 are selected at random, find the probability that a. All are defective b. None are defective a. The probability is 165 Type a fraction. Simplify your answer.) b. The probability is Type a fraction. Simplify your answer.) Enter your answer in the answer box and then click Check Answer All parts showing Clear All Check Answer S:55 PM O Type here to search

Explanation / Answer

P(Defective transistors) = 3 / 11

P( Non - defective transistors) = 8 / 11

a)

P( All are defective) = 3C3 / 11C3

= 1 / 165

b)

We have to calculate probability that all three tansistors are non-defective,

that is all three stransistors came from 8 non-defective transistors.

P( None are defective) = 8C3 / 11C3

= 56 / 165

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