Four bands are going to play in a concert. In how many different orders can the bands play

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

same question do you know the answer

anwser : 9 years

pats age should be less than 10 , therefore the greatest age (in integer)that pat can be is 9 years