Probability?

Hello everyone, I'm currently studying for an exam and really need help! Would someone be so kind as to explain to me how number 10 works? How do I calculate the total number of possible combinations? How exactly does b) work? Etc. I would really appreciate any help!!

How likely is it that a cat will have a complete litter of three lucky kittens?

Given the occasion, here is something for mathematicians. To our great joy, a completely black cat has "nested" in our barn to bring up her three lucky kittens. Now I've read that there's a 1% chance that a cat will be born a lucky kitten. Now the question: How likely is it that a cat…

Binomial distribution?

Unfortunately, I fail to solve the following task: A series of collectible cards includes 40 different images. These are included with a specific type of chocolate bar. The manufacturer of the chocolate bars guarantees that all images are included with the bars with equal frequency and in a well-mixed pattern. Task: After buying a certain…