The probability of catching fish in one hour is 0.64? What is the probability of catching fish in half an hour?
Regular solution follows the principle for an opposite event: a probability of NOT catching fish in one hour is
1-0.64=0.36. Probability of not catching fish in an hour is not catching in first half of an hour multiplied by not catching in second half of an hour
p' x p' = 0.36. Therefore
p' = 0.6. Using opposite event again
1 - 0.6 = 0.4 is the probability of catching fish in half an hour.
But how to define the probability in terms only of successful event? Which formula should I use to calculate
p directly? Is it possible at all?