Question

Janis tossed a coin twice. She made a tree diagram to show the possible outcomes.

Answer 1

The probability of tossing a head is =1/2

The probability of tossing a tail is =1/2

If the coin is tossed twice, the probability of tossing two heads will be given by

`P(HnH)=(1)/(2)*(1)/(2)=(1)/(4)`

If Janis tossed the coin three times, then the tree diagram will be extended as shown below:

Hence,

`P(HnHnH)=(1)/(2)*(1)/(2)*(1)/(2)=(1)/(8)`