Question

A man takes a step forward with probability 0.4 and backwards with a probability 0.6. Find the probability that after 11 steps he is just one step away from the starting point.

Answer 1

Answer:

Step-by-step explanation

5 step forward 6 step backwards or

6 step forward 5 step backwards

11 C 5 (.4)^5*(.6)^6 + 11 C 6 (.4)^6*(.4)^5