If two events are independent, then the joint probability of these two independent events is calculated as:
P(A and B) = P(A) x P(B)
Example
Suppose we roll two dice. The joint probability of getting a 1 on first die and a 6 on the second die is given as follows:
Probability of getting a 1 on first die, P(A) = 1/6
Probability of getting a 6 on second die, P(B) = 1/6
P(A and B) = 1/6 * 1/6 = 1/36 = 0.0278
The same rule can be applied to calculate the joint probability of any number of independent events. For example, if there are three independent events, A, B and C, their joint probability will be:
P(A and B and C) = P(A) x P(B) x P(C)