The probability that event M will not occur is 0.8 and the probability that event R will not occur is 0.9. If events M and R cannot both occur, which of the following is the probability that either event M or event R will occur?	Choose the correct choice:
A) 1/5
B) 2/5
C) 3/10
D) 4/5
E) 12/25
p(m) =0.2   p(r) =0.1   p(m intersection r) = 0 (If events M and R cannot both occur)   p(m or r) = 0.2+0.1= 
<gadget id="calculator">0.2+0.1</gadget>
<output>0.3</output>
0.3   3/10orrected !!   Answer 3/10
<result>C</result>
The probability that event M will not occur is 0.8 and the probability that event R will not occur is 0.9. If events M and R cannot both occur, which of the following is the probability that either event M or event R will occur?