What is the mathematical formula to find the total number of combination?
the number of ways of choosing 1 from 3 colours is 3 so first part correct the number of ways of choosing 2 from 3 colours where there can be the same is 3*3=9 (three ways for the first 3 ways for the second) so second part also correct the number of ways of choosing 3 from 3 colours is 3*3*3=27 (as above and 3 ways for the third) so your third part and the other answerer’s third part are wrong
