Ayya, independent means one event doesn't affect the other, like me passing Maths and also finding a lost screwdriver—P(A and B) is P(A)*P(B). Mutually exclusive means both can't happen together, like me getting full marks and failing the same test—P(A and B) becomes zero. You subtract P(A and B) in P(A or B) only when events are *not* mutually exclusive, to avoid double-counting the overlap. I remember this because while calculating the probability of Abbu's shop being busy *or* my sister helping with invoices, they sometimes happen together, so I must subtract that common chance, just like fixing an old fan—you account for the overlapping wires.
#olympics#ioc
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