1. Two mark exercise problems I

1. Suppose, you have two shorts, one is black and the other one is blue, three shirts which are in white, blue and red. You again wish to make different combinations, but you always want to make sure that the shorts and shirt that you wear are of different colours. List and check how many combinations are possible now.

 

The total possible combination that you can wear is .

 

2. You have two red and two blue blocks. How many different towers can you build that are four blocks high using these blocks? List all the possibilities.

 

The total possible combination is .