if 2 coins are tossed 20 times, how many of those tosses would you expect to result in both coins landing heads up? show your calculations.
my attempt:
for each toss the probability of heads is 0.5 therefore the probability of heads for both coins is 0.5 * 0.5 = 0.25
5/20 times the coins will both be heads up.
is this all correct? any help would be appreciated. thanks
seems fine to me
why are there so many math questions now? 🙄
5 is the average number of times two heads will turn up. It is possible for anything from zero to 20 to happen though.
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