Abucket contains 5 green tennis balls to yellow tennis balls, 6 thread tennis balls and a blue tennis balls toner removes 4 tennis balls without replacement from the bucket, what is the probability that 20 removes one yellow, one green, one blue and one more blue tennis ball?

total ball 17

without replacement

rearagement 'ygbb' --> 4!/2! = 12

probability without rearagement

hence total probability

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

96 39 cause 135 -96=39 im smart (i used a calculater)