Answer:
The probability that it will land below the sixth step and heads up is 
Step-by-step explanation:
Given : You accidentally dropped a coin from the top of 7 stairs.
To find : What is the probability that it will land below the sixth step and heads up?
Solution :
A coin has two sides - head and tail.
Probability of getting head is

Total stairs are 7.
Coin will land below the sixth step i.e. it land on 7th step.
So, Probability of landing coin on below the sixth step is

Now, The probability that it will land below the sixth step and heads up is


Therefore, The probability that it will land below the sixth step and heads up is 