Marlon asks a friend to think of a number from 5 to 11 What is the probability that Marlon’s friend will think of the number 9 ?

The whole numbers from 5 through 11 are 5, 6, 7, 8, 9, 10, and 11, so there are 7 possible numbers. Only one of them is 9, making the probability 1 out of 7. The correct choice is “1 seventh.”

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