CPM Homework Help : CC2 Problem 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:

Hint:

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

$\text{P}\left(\text{multiple of}\ 10\right)$ ?
Hint (a):
How many multiples of ten are there from $1$ to $50$ ? How many possible outcomes are there?
Answer (a):
$\frac{1}{10}$

$\text{P}\left(\text{not}\ 100\right)$ ?
Hint (b):
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 $1$ .
Answer (b):
$1$

$\text{P}\left(\text{not a multiple of}\ 4\right)$ ?
Hint (c):
How many multiples of $4$ are there from $1$ to $50$ ?
Answer (c):
$\frac{38}{50}$

$\text{P}\left(\text{one-digit number}\right)$ ?
Hint (d):
How many one-digit numbers are there from $1$ to $50$ ?
Answer (d):
$\frac{9}{50}$

Explore the problem with the eTool below.
Click the link at right for the full version of the eTool: 2-11 HW eTool