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?
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A$$\frac{1}{5}$$
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B$$\frac{2}{5}$$
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C$$\frac{3}{5}$$
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D$$\frac{4}{5}$$
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E$$\frac{12}{25}$$