MATH 120 Lecture 18: Chapter 8.4 Binomial Probability

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17 Jul 2017
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The equation for this is: c(n, x) . The probability of "failure" is 1 - p. The number of trials is represented by n. The number of "failures" is n - x. The ftc says 29% of price scanners are defective. So the probability of the price scanners being defective, or. This means that the probability of the price scanners being effective, or "successes", is . 71, or p. We know that there were 20 trials, or n. Out of these 20 trials, there were only 18 successes, or x. This means that 2 were failures, or n - x. Let"s plug all these numbers into our equation. (n - x) C(n, x) (1 - p) xp (. 71) The probability that 18 work and 2 are defective is 3. 36%. I don"t know what your professors will say, but we were allowed to use a calculator to input this equation so So getting a "success" or "failure" is going to be 1.

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