Question

The probability of an event lies between.

• A. $-1\le P\le 1$
• B. $0\le P\le 1$
• C. $-1\le P\le 0$
• D. $\displaystyle -1

Answer 1

The correct option is B $0\le P\le 1$

Probability by definition is the extent to which an event is likely to occur, measured by the ratio of the favourable cases to the whole number of cases possible.

Since number of elements in the set of favorable cases is less than or equal to the number of elements in the set of whole number of cases, their ratio would always end up being 1 or less than one. and more than 0.