A driving exam consists of 28 ​multiple-choice questions. Each of the 28 answers is either right or wrong. Suppose the probability that a student makes fewer than 9 mistakes on the exam is 0.28 and that the probability that a student makes from 9 to 17 ​(inclusive) mistakes is 0.51. Find the probability of each of the following outcomes. a. A student makes more than 17 mistakes b. A student makes 9 or more mistakes c. A student makes at most 17 mistakes d. Which two of these three events are​ complementary?

your answer is d 2,500

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

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step-by-step explanation: