Question 62765: A spinner has regions numbered 1 through 18. What is the probability that the spinner will stop on an even number or a multiple of 3?
Answer by uma(370)   (Show Source):
You can put this solution on YOUR website! Clearly sample space S = {1,2,3,4 5,.....18}
Let E = event of stopping at an even number or a multiple of 3.
= {2,3,4,6,8,9,10,12,14,15,16,18}
So n(S) = 18 and n(E) = 12
Therefore P(stopping at an even number or a multiple of 3) = P(E)
= n(E)/n(S)
= 12/18
= 2/3
Hence the required probability = 2/3
Good Luck!!!
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