Question

Cora is playing a game that involves flipping three coins at once. Let the random variable HHH be the number of coins that land showing "heads". Here is the probability distribution for HHH: H= \# \text{ of heads}H=# of headsH, equals, \#, start text, space, o, f, space, h, e, a, d, s, end text 000 111 222 333 P(H)P(H)P, left parenthesis, H, right parenthesis 0.1250.1250, point, 125 0.3750.3750, point, 375 0.3750.3750, point, 375 0.1250.1250, point, 125 P(H < 3)=P(H<3)=P, left parenthesis, H, is less than, 3, right parenthesis, equals

Answer 1

Answer:

The answer is actually 0.5, the other ones are wrong.

Step-by-step explanation:

Answer 2

Answer:

0.875

Step-by-step explanation:

P(H=0) = 0.125

P(H=1) = 0.375

P(H=2) = 0.375

P(H=3) = 0.125

P(H<3) = P(H=0) + P(H=1) + P(H=2)

P(H<3) = 0.125 + 0.375 + 0.375

P(H<3) = 0.875