A coin is tossed 20 times. The outcome H or heads And T for tails are recorded, tails for 11 times heads for 9. What is the experimental probability of getting heads?

You simply divide the number of times you get heads (which is 9) over the total number of coin flips (which is 20)

So the answer as a fraction is 9/20

Converting to decimal form, you'd get 9/20 = 0.45