1.

If A, B, C are three events, then which of the following is/are not correct?a.P (Exactly two of A, B and C occur)leP(AnnB)+P(BnnC)+P(CnnA)b.P(AuuBuuC)leP(A)+P(B)+P(C) c.P (Exactly one of A, B and C occur)leP(A)+P(B)+P(C)-P(BnnC)-P(CnnA)-P(AnnB)d.None of these

Answer»

P (Exactly two of A, B and C occur)
`LEP(AnnB)+P(BNNC)+P(CnnA)`
`P(AuuBuuC)leP(A)+P(B)+P(C)`
P (Exactly one of A, B and C occur)
`leP(A)+P(B)+P(C)-P(BnnC)-P(CnnA)-P(AnnB)`
NONE of these

Answer :D


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