Question

You flip 3 coins. Use a tree diagram to calculate the probability that you get exactly 3 heads.

A. 3/8
B. 1/2
C. 4/8
D. 1/8
E. 1/4

Answer 1

i think its D

Answer 2

1st coin: 1/2 chance
2nd coin: 1/2 chance
3rd coin: 1/2 chance
1/2 * 1/2 * 1/2 = 1/8

Answer 3

\[\matrix{h&h&h&h&t&t&t&t\\h&h&t&t&t&t&h&t\\h&t&h&t&t&h&t&t}\]
You can clearly see that the probability of getting 3 heads \[\frac{1}8\] is equal to the probability of getting 3 heads. You could also do a probability distribution for getting 1, 2, 3 heads for different trials

Answer 4

I meant 3 tails

Answer 5

what i was gonna say...