Step 1:
You will draw a tree diagram to illustrate the information.
Step 2:
The tree diagram shows the first and the second coin.
Next, write the formula for the probability.
[tex]Probability\text{ of any event = }\frac{n\text{umber of required event}}{\text{sample space (Total possible outcomes)}}[/tex]
Step 3:
The sample space = {HH, HT , TH , TT} = 4
Event space = {HH , HT , TH} at least one head = 3
Step 4:
Substitute in the formula to find the probability of getting at least one head.
[tex]=\text{ }\frac{3}{4}[/tex]
Final answer
The probability of getting at least one head
[tex]\text{= }\frac{3}{4}[/tex]
