A coin is tossed 500 times, out of which the head comes up 200 times. What is the probability of tails coming up on a random coin toss?

$\begin{array}{c}Probability of tails coming up =\frac{Total no. of time coin tossed - No. of Times head comes up}{Total no. of time coin tossed}\\ =\frac{500 - 200}{500}\\ =\frac{300}{500}\\ =\frac{3}{5}\end{array}$