Math 30-2

Unit 2: Counting Methods

Lesson 5: Combinations - Part Two

I need the solutions for these questions. please. I will write the answer key after the questions that my teacher gave it to me. Please and thank youu!!!

2. The school play will consist of 7 players to be chosen from the 15 students who auditioned

for the parts. How many selections are possible if the company must include Ella?

3. How many different rectangles can be formed by nine horizontal lines and four vertical

lines?

5. A choir director has five sopranos and seven bases on her choir.

a) How many different lead groups are there if the star singer, who is a soprano, must be

included?

9. Develop a problem where 8C3 would be an applicable as a solution.

Answer Key

2. 3003

3. 72

5. a)126

9. Answers vary