A box contains 3 chocolate chips, 5 oatmeal raisin ,and 4 peanut butter cookies. one cookie is randomly selected. what is the probability that a peanut butter cookie will be selected

1/3 or .333 or 33%

Step-by-step explanation

You take the 4 (peanut butter cookies) divided by the total number of cookies (12)

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.