Question

 what is the probability of getting at least two heads?

 

Answer 1

The total number of trials is 200.

Let A be the event of getting atleast two heads.

The number of times A happens is 72 + 23 = 95 .

Remember the empirical or experimental or observed frequency approach to probability.

If n be the total number of trials of an experiment and A is an event associated to it such that A happens in m-trials. Then the empirical probability of happening of event A is denoted by P (A) and is given by

`P (A) = m/n`

Therefore, we have

`P (A) = 95/200`

          = `19/40`