What does A denote?

Question

If A denotes some? event, what does Upper A overbarA ?denote? If ?P(A)equals=0.9930.993?, what is the value of ?P(Upper A overbarA?)? If ?P(A)equals=0.9930.993?, is Upper A overbarA ?unusual?

Answer 1

Hi Annie

If you have

A = denote some event, P(A) = 0.9930

A^- = denotes not A  (There is no symbol for A bar), The probability of P(A) and P(A^-)  are such that

P(A) + P(A^-) = 1

0.9930 + P(A^-) = 1

P(A^-) = 0.007

Yes, A^- is an unusual event, the probability that such an event will occur is very rare ~ 0.7%