# Probability For Class 10

Probability is defined as the likelihood of an event to occur. Many events cannot be predicted with total certainty, thus with the help of probability we predict the chance of an event to occur.

The probability of an event (E) is given as-

$P(E) = \frac{Number \; of \; trials \; in \; which \; the \; event \; happened}{Total \; number \; of \; Trials}$

It is to be remembered that $0 \leq P(E) \leq 1$,, as the number of trials is always less than or equal to the total number of trials.

#### Practise This Question

Find the value of y for which the following expression y28 becomes zero.