First we must determine how many hair ties are in the bag by adding all of them together.

We know from the information provided in the problem that there are  green hair ties in the bag, so the probability of Jennifer grabbing one green hair tie from the seven possible hair ties is .

Since there are 6 reds out of 28, divide .

Move the decimal 2 places to the right 21.4% and round to the nearest whole number  21%.

First we must determine how many toy cars Brian has in the box by adding them together.

We know from the information provided that there are  white cars in the box, so the probability of Brian picking up one white car from the  possible cars is .

To find the probability of an outcome, set up a fraction: .

Since there are 13 yellow balls PLUS 11 yellow balls (part) out of 64 balls in all (total possible) the fraction we can find what the fraction looks like.

If you reduce the fraction by 8 (because the numerator and the denominator are both divisible by 8), it can be simplified.

Since the question asks you to state the probability as a percent, we need to convert fraction to percent. We can set up a proportion.

Cross multiply and solve for .

This equals 37.5. Rounded to the nearest whole number gives us 38%.

Out of fifty-two cards, there are thirteen hearts, but since we are excluding the queen, this makes twelve cards that we are including. Out of the four queens, we include three of them - again, excluding the queen of hearts. This makes fifteen cards out of fifty-two, so the probability of drawing one of them is .

Out of fifty-two cards, there are thirteen spades; also, there are four kings, but one is a spade, so this makes three additional cards for a total of sixteen. The probability of drawing a card that is a king and/or a spade is therefore sixteen out of fifty-two, or:

The simplest way to solve this is to make a chart of all of the multiples of 6 (just count by 6) from 1-90:

6     12     18     24     30

36    42     48     54     60

66    72     78     84     90

That makes 15 numbers, which will be our denominator.

Next, look through the list and identify the numbers that are divisible by 4 (divisible by 2, and then 2 again).

6     12     18     24     30

36    42     48     54     60

66    72     78     84     90

That is 7 numbers. Thus, of these multiples of 6 are also divisible by 4.

To fine the chance of Susan picking a blue candy, consider how many blue candies there are: 3

Compared to how many candies there are total: 12

That means the chance of Susan picking a blue candy is , which simplifies to .

Red here is the correct answer. Marcus has a 4 out of 24 chance of choosing red, as there are 4 red crayons in a box of 24. Reduce the probability, and you get 1 out of 6.

To find the probability of Jessica NOT picking a red eraser is the same as finding the probability that it is everything else that she wants.

First find the total number of erasers Jessica has by adding all of them no matter what the color may be.  These are all the options whether she wanted them or not.  In total there are  total erasers.

Then count all of the erasers that are NOT red.  That would be  erasers that are NOT red.

The probability would be set up as:

So, you would have