
### Instruction: help me answer this question In this question, we get 2 options that are (i) Either all 3 will join or (ii) None of them will join., think step by step
### Assistant: For option (i), we have to choose 7 students from the remaining 22 in the class. The number of ways to choose 7 students from 22 is 22C7. For option (ii), we have to choose 10 students from the remaining 22 without including the 3 students. The number of ways to choose 10 students from 22 without the 3 is 19C10. , The answer is The excursion party can be chosen in 646800 or 177100 ways, respectively
