SOLUTION: A spinner has regions numbered 1 through 21. What is the probability that the spinner will stop on an even number or a multiple of 3?
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Question 1089244: A spinner has regions numbered 1 through 21. What is the probability that the spinner will stop on an even number or a multiple of 3?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
Among the numbers from 1 to 21,
there are even numbers, from to ;
there are multiples of 3, from to ,
including multiples of 6 (even and multiples of 3), from to .
Those multiples of 6 would be counted doubly, so among the numbers from 1 to 21,
there are that are either even and/or multiple of 3.
The probability that the spinner will stop on one of those numbers is
.
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