suppose a reputed psychic in an extrasensory perception (ESP) experiment has called heads or tails correctly on ten successive tosses of a coin, what is the probability that guessing would have yielded this perfect score? Solution She has a chance of ½ of calling it correctly on every toss. Therefore the probability of calling it correctly 10 times in a row = ½ x ½ x ½ x . . . . . . . ½ (10 times) = (½)^10 = 1 / 1024, or 0.000977 Hope that helps!.