Let upper delta dot tilde upper delta pan. find the missing side x.

i believe the correct answer is b.

answer. d.289 hope that

there were a lot of them but the first one to pop up on a google search was bts

in counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: httt, thtt, ttht, or ttth. each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.