Question

Bob has a box of 14 origami papers out of which 5 are red in colour, 6 are blue in colour and 3 are black in colour
In how many ways can he select the papers if he wants every selection to have at least 1 black paper and at least 1 blue
paper?​

Answer 1

Answer:

(12a + b) (3a + b) = 36a² + 60ab + 3ab + 5b² = 36a² + 63ab + ...

Step-by-step explanation: