How many different 2 card hands have both cards with matching rank (for example, two kings or two 5’s)? please show a step by step solution.

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

Having a hard time understanding this question (see attachment).

Pls the last one and it has to be like number 6