human
Calculate the probability of three or more dependent events occurring without drawing a tree diagram There are \( 5 \) red balls and \( 4 \) yellow balls in a cup ![A cup with 5 red and 4 yellow balls in it. All of the balls are the same size.]() Kate picks out three balls at the same time.

She wants to work out the probability all the balls are red.

What is the denominator of the final unsimplified answer? \( 9 \)
gpt
Thinks the denominator in a combined probablity will be the same as the denominator in the probability of the first event.