The probability that event M will not occur is 0.8 and the probability that event R will not occur is 0.8. If events M and R cannot both occur, which of the following is the probability that either event M or event R will occur?
Select
A) 1/5  B) 2/5  C) 3/5  D) 4/5  E) 12/25
p(m) =0.2   p(r) =0.2   p(m intersection r) = 0 (If events M and R cannot both occur)   p(m or r) = 0.2+0.2= 
<gadget id="calculator">0.2+0.2</gadget>
<output>0.4</output>
0.4   Corrected !!   Answer 2/5
<result>B</result>
The probability that event M will not occur is 0.8 and the probability that event R will not occur is 0.8. If events M and R cannot both occur, which of the following is the probability that either event M or event R will occur?