The probability that event \(M\) will not occur is \(0.8\) and the probability that event \(R\) will not occur is \(0.6.\) If events \(M\) and \(R\) cannot both occur, which of the following is the probability that either event \(M\) or event \(R\) will occur?

A) \(\dfrac15\)

B) \(\dfrac25\)

C) \(\dfrac35\)

D) \(\dfrac45\)

E) \(\dfrac{12}{25}\)

Answer: C

Source: Official Guide