Question

A coin is weighted so that the probability of getting heads is 0.70. If the coin is flipped twice, what is the probability of getting a tail followed by a head?

Answer 1

P(heads) = 0.70
P(tails) = 0.30

P(tails followed by heads) = 0.30 * 0.70

Answer 2

where does .30 come from

Answer 3

The total probability is 1.
If the probability of heads is 0.70, and the onty other possible outcome is tails, that means the probability of tails is 1 - 0.7 = 0.3

Answer 4

thank you

Answer 5

makes sense now

Answer 6

You're welcome.

Answer 7

wait so the answer is 0.21???

Answer 8

@mathstudent55 @cabette ^^

Answer 9

Yes.