Part two is what I need help with Thank you ahead of time Fi

Part two is what I need help with! Thank you ahead of time

Find the probability distribution for the number of jazz CDs when 4 CDs are selected at Random from a collection consisting of 6 jazz CDs, 4 classical CDs. and 5 rock CDs:

Solution

b) total 15 cd are there and we have to get the probability of 2 jazz and 2 rock

4 ARE SELECTED BY 15C4

PROBABILITY OF GETTING JASS = 6/15

PROBABILITY OF GETTING ROCK = 5/15

SO PROBABILITY OF GETTINF 2 ROCK AND 2 JAZZ = (6/15)^2*(5/15)^2= 0.271