The probability of an event A, P(A), is:

Where:
n(A) = number of favorable outcomes to A;
N = total number of outcomes.
In this problem,
n(A) is the number of caramel cookies;
n(A) = 14.
N is the total number of cookies;
N = 14 + 24 + 11 + 21;
N = 70.
So, substituting the values:

Answer:
P(A) = 0.2 or 20%.