### Home > CC2 > Chapter 2 > Lesson 2.1.1 > Problem2-11

2-11.

Nicole has a machine that will produce a number from $1$ through $50$ when she pushes a button. If she pushes the button, what is:

Remember the formula for probability of an event: $\large \frac{\text{number of successful outcomes}}{\text{number of possible outcomes}}$

1. $\text{P}\left(\text{multiple of}\ 10\right)$?

How many multiples of ten are there from $1$ to $50$? How many possible outcomes are there?

$\frac{1}{10}$

1. $\text{P}\left(\text{not}\ 100\right)$?

How many numbers are there from $1$ to $50$ that are not $100$? Don't be surprised if your answer is not a fraction less than $1$.

$1$

1. $\text{P}\left(\text{not a multiple of}\ 4\right)$?

How many multiples of $4$ are there from $1$ to $50$?

$\frac{38}{50}$

1. $\text{P}\left(\text{one-digit number}\right)$?

How many one-digit numbers are there from $1$ to $50$?

$\frac{9}{50}$

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Click the link at right for the full version of the eTool: 2-11 HW eTool (CPM)