Question

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?
StartFraction 1 over 9 EndFraction
StartFraction 1 over 7 EndFraction
StartFraction 1 over 6 EndFraction
StartFraction 9 over 11 EndFraction

Answer 1

To find the probability that Marlon's friend will think of the number 9, we first need to determine the total number of possible numbers that can be chosen.

The numbers from 5 to 11 are: 5, 6, 7, 8, 9, 10, and 11. This gives us a total of:

- 5
- 6
- 7
- 8
- 9
- 10
- 11

There are 7 numbers in total.

Since there is only 1 favorable outcome (thinking of the number 9), we can calculate the probability as follows:

\[
\text{Probability of thinking of 9} = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} = \frac{1}{7}
\]

Thus, the probability that Marlon’s friend will think of the number 9 is:

\[
\boxed{\frac{1}{7}}
\]