##.25##
The amount of ways the toast can land jelly side up 3 out of 4 times using the binomial distribution we can look at this as the total number of success from 4 trials with probability ##p=1/2## thus
##(“_k^n)p^k(1-p)^(n-k)##
##(“_3^4)(1/2)^3(1-1/2)^(4-3)##
##4(1/2)^4 = 1/4 = .25##
You can also go through the combinations for this and see that the total number of combinations of front to back is ##2^4## which is the denominator and then the amount of ways you can get 3 out of 4 is ##(“_3^4) ## is the numerator
##((“_3^4))/2^4 =.25 ##



