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Suppose, R is a random real number between 5 and 9. What is the probability R is closer to 5 than it is to 6?(a) 12.5%(b) 18%(c) 73%(d) 39.8%This question was addressed to me in quiz.My question is from Geometric Probability topic in portion Discrete Probability of Discrete Mathematics

Answer»

Correct answer is (a) 12.5%

The best I can explain: Since there are infinitely many possible outcomes for the value of X we will take the EQUALLY LIKELY outcomes as RANDOM points along the number LINE from 5 to 9. R will be closer to 5 than it is to 6 if R<5.5. We can easily see it by drawing a probability line. Here, P(R is closer to 5 than to 6) = (length of segment where 5



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