Everybody come in g O o g l e meet
yfk-dtsu-jod​

hreryryrranswer:

step-by-step explanation:

the answer is:

mean: 6

mad: 2.14

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.