Answer:
if they are equal then it would be 6.5
2a+8a
Add 2 and 8.
2a+8a=10a
Answer:
0.03125
Step-by-step explanation:
If we have a fair coin the probability of landing a head is 50%.
We can think the question as what is the probability of landing four tails and then a head. That is we needed at least 5 tries to get a head.

Since this events are independent we can write it as
