A cookie jar contains 6 chocolate chip cookies, 4 oatmeal cookies, 8 peanut butter cookies, and 2 sugar cookies. If a cookie is pulled from the jar what is the probability that it is oatmeal or peanut butter?
To find the probability of pulling an oatmeal or peanut butter cookie, we need to know the total number of cookies in the jar, as well as the number of oatmeal and peanut butter cookies.
1. Calculate the total number of cookies: 6 (chocolate chip) + 4 (oatmeal) + 8 (peanut butter) + 2 (sugar) = 20 cookies
2. Calculate the number of oatmeal and peanut butter cookies: 4 oatmeal cookies + 8 peanut butter cookies = 12 cookies
3. Calculate the probability of pulling an oatmeal or peanut butter cookie by dividing the number of oatmeal and peanut butter cookies by the total number of cookies: 12 / 20 = 0.6
Therefore, the probability of pulling an oatmeal or peanut butter cookie from the jar is 0.6, or 60%.
To find the probability that a cookie pulled from the jar is oatmeal or peanut butter, we need to find the total number of oatmeal cookies and peanut butter cookies, and divide it by the total number of all the cookies in the jar.
Step 1: Find the total number of oatmeal cookies and peanut butter cookies.
In this case, there are 4 oatmeal cookies and 8 peanut butter cookies, so the total is 4 + 8 = 12.
Step 2: Find the total number of all the cookies in the jar.
In this case, there are 6 chocolate chip cookies, 4 oatmeal cookies, 8 peanut butter cookies, and 2 sugar cookies, so the total is 6 + 4 + 8 + 2 = 20.
Step 3: Calculate the probability.
The probability of pulling an oatmeal or peanut butter cookie is the total number of oatmeal and peanut butter cookies (12) divided by the total number of all the cookies in the jar (20).
Therefore, the probability of pulling an oatmeal or peanut butter cookie is 12/20, which can be simplified to 3/5 or 0.6.
So, the probability that a cookie pulled from the jar is oatmeal or peanut butter is 0.6 or 60%.
Either-or probabilities are found by adding the individual probabilities.
4/20 + 8/20 = ?