Question

In 3 billion repetitions of an experiment, a random event occurred in 500 million cases.

Answer 1

Answer:

The expected probability of the complement of the event is:

                      $\dfrac{5}{6}$

Step-by-step explanation:

We know that for any event A and the complement of the event i.e. $A^c$ the sum of the probabilities of both the events is equal to 1.

i.e. if P denote the probability of an event then we have:

$P(A)+P(A^c)=1$

Here we have the probability of event A as:

                $P(A)=\dfrac{1}{6}$

Hence,

$\dfrac{!}{6}+P(A^c)=1\\\\\\i.e.\\\\\\P(A^c)=1-\dfrac{1}{6}\\\\\\i.e.\\\\\\P(A^c)=\dfrac{6-1}{6}\\\\\\i.e.\\\\\\\\P(A^c)=\dfrac{5}{6}$

           Hence, the answer is:

                $\dfrac{5}{6}$

Answer 2

5/6 is your other percentage