SOLUTION: A possibility space consists of the integers from 1 to 20 inclusive. a) Find the probability a number chosen at random is a multiple of 2 b) Find the probability a number chose

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Question 1065601: A possibility space consists of the integers from 1 to 20 inclusive.
a) Find the probability a number chosen at random is a multiple of 2
b) Find the probability a number chosen at random is a multiple of 3

Answer by math_helper(2461) About Me  (Show Source):
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There are 10 even numbers and 10 odd numbers on the interval [1,20]
a) Pr{number chosen at random is a multiple of 2} = 10/20 = 1/2 = highlight%280.5%29
There are floor(20/3) = floor(6.667) = 6 numbers divisible by 3 on the interval [1,20]
b) Pr{number chosen at random is a multiple of 3} = 6/20 = 3/10 = highlight%280.3%29