An internet firm considers three posibble mistakes in completing an order
A: The Wrong item is sent.
B: The item is lost in transit.
C: The item is damaged in transit.

Assuming the event A is independent of both B and C and that events B and C are mutually exclusive. The individual probabilities are P(A)=0.02, P(B)=0.01 and P©=0.04. Find the probability that at least one of the events, A,B or C occurs for a randomly chosen order.

This is how i do it, P(A)(P(B)+P©) = 0.02(0.01+0.04) = 1/1000 is it correct? Or can someone guide me to walkabout this question.