15. Which one are false
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If the event A, B, C covers the entire possible outcome in the experiment. Then,P (A) +P (B) +P(C) =1
The probability of an event (U) which is impossible to occur is 0. Such an event is called an impossible event P (U)=0
The probability of an event (X) which is sure (or certain) to occur is 1. Such an event is called a sure event or a certain event P(X) =1
Probability of any event can be 0 \P(E) \ 2
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the probability of an event which is impossible to occur is zero such an impossible event is called an impossible event
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