discrete

solve it with combination without repetition

A supermarket is selling different types of soft drinks (Cola, 7up, fanta, Sprite, LabanUp, Fayrouz, Bavaria, Lemonada), but there are only 10 cans (Ads) of Cola left in the supermarket. Suppose you want to buy 30 cans of soft drinks, in how many ways these 30 cans can be distributed? Explain your answer in every step and make sure to calculate the final results and show how the calculation was done in every step. and you should use the counting laws and theories learned in chapter 9