Question 615853
The probability is really p = 0.5 (since 1/2 = 0.5)


Now look for the value of p = 0.5 (in green). Below is the answer (in red)

<pre>
n  x     0.01  0.05  0.10  0.20  0.30  0.40  <font color="green">0.50</font>  0.60  0.70
5  0     .951  .774  .590  .328  .168  .078  <font color="red">0.031</font>  .010  .002
</pre>


Answer: So the probability of getting exactly 0 heads in 5 flips is approximately <font color="red">0.031</font>