A bag of marbles contains 4 red marbles and 4 green marbles. Each red marble was labeled with a different number, 1 through 4, a
nd each
green marble was labeled with a different number, 1 through 4.
Which set represents the event, A, that Karen took a marble that was either green or had an even number?
green marble was labeled with a different number, 1 through 4.
Which set represents the event, A, that Karen took a marble that was either green or had an even number?
1 answer:
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Let be "x" the number of colored pencils in the box.
According to the information given in the exercise, there are 84 pencils in the box and 53 of them are regular pencils.
Knowing this information, you can set up the following equation:
Finally, you have to solve for the variable "x" in order to find its value. In order to do this, you can apply the Subtraction property of equality by subtracting 53 from both sides of the equation:
The answer is: There are 31 colored pencils in the box.