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If spinner has 3 equal sectors colored yellow, blue and red, then the probability of landing on red or yellow after spinning this spinner is _______(a) \(\frac{2}{3}\)(b) \(\frac{4}{7}\)(c) \(\frac{6}{17}\)(d) \(\frac{23}{47}\)I had been asked this question by my college director while I was bunking the class.This key question is from Addition Theorem on Probability in chapter Discrete Probability of Discrete Mathematics

Answer»

Correct choice is (a) \(\FRAC{2}{3}\)

To explain: We can have, P(red)= \(\frac{1}{3}\), P(YELLOW) = \(\frac{1}{3}\),P(red or yellow)=P(red)+P(yellow) = \(\frac{1}{3} + \frac{1}{3} = \frac{2}{3}\).



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