probability of coin toss, please help :)

[Fa23]

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

[JackBean]

seems fine to me

why are there so many math questions now?

[Rap]

5 is the average number of times two heads will turn up. It is possible for anything from zero to 20 to happen though.