your odds of correctly guessing the outcome of a flipped coin are 1 in 2, but your odds of guessing correctly twice in a row are only 1 in 4 —
your odds of correctly guessing the outcome of a flipped coin are 1 in 2, but your odds of guessing correctly twice in a row are only 1 in 4 —
gambler's fallacy:20
gambler's fallacy
assuming a fair coin: the probability of 20 heads, then 1 tail is 0.520 × 0.5 = 0.521 the probability of 20 heads, then 1 head is 0.520 × 0.5 = 0.521 the probability of getting 20 heads then 1 tail, and the probability of getting 20 heads then another head are both 1 in 2,097,152.