How do you work this out?

A bowl contains 6balls, 4 black and 2 red.We wish to draw a ball from the bowl, records the color, and then replace the ball, repeating until we draw a red ball. What is the probability that we will take exactly4tries before we draw a red ball ? Use Excel to find the probability, rounding to three decimal places.

What did you use for Number_f?

What did you use for Number_s?

What did you use for Probability_s?

What did you use for Cumulative?