1.

If M and N are any two events, the probability that at least one of them occurs is

Answer»

<P>`P(M)+P(N)-2P(McapN)`
`P(M)+P(N)-P(McapN)`
`P(M)+P(N)+P(McapN)`
`P(M)+P(N)+2P(McapN)`

ANSWER :B


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