Question

Ten students need to present their reports. Five can present each day. How many ways can the teacher choose a group of five students to present their reports on the first day? How many ways can the teacher choose a group of 5 students to present on the first day of Marjorie must present on the first day?

Answer 1

1) Since order does not matter, 10C5 = 252.
2) I don't think I understand the 2nd question, can you elaborate.

Answer 2

Answer:

1) 252

2) 126

you welcome