1.

The numbers between 1 and 520, including both, are divisible by 2 or 6 is _______(a) 349(b) 54(c) 213(d) 303I had been asked this question in exam.This key question is from Discrete Probability topic in chapter Discrete Probability of Discrete Mathematics

Answer»

Right option is (d) 303

The BEST I can explain: We ADD the number of numbers that are DIVISIBLE by 2 and 6 and subtract the numbers which are divisible by 12. Hence, the required probability is

\(\frac{520}{2} + \frac{520}{6} – \frac{520}{12}\) = 303.3 = 303(APPROXIMATELY).



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