# Algebra

there are 10 students in a social studies class. three students will be selected to present their term projects today. In how many different orders canthree students be selected?

1. 👍 0
2. 👎 0
3. 👁 760
1. combinations of 10 three at a time
=
10!/ [ 3! (10-3)! ]

= 10 * 9 * 8 *7* .......1 /[3*2(7*....1) ]

= 10 * 3 * 4

= 120

or look up binary coefficient (10,3)
= 120

or look at Pascal's triangle row 10, element 3 (the eleventh row, fourth element really since zero counts) again 120

1. 👍 1
2. 👎 0
posted by Damon

## Similar Questions

1. ### Algebra

There are 12 students in a social studies class. Three students will be selected to present their term projects today. In how many different orders can three students be selected?

asked by Hope on May 22, 2018
2. ### American education

You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4 African American students, 3

asked by diamond on August 5, 2009
3. ### AED

this what i have so far and I need 44 more words: Instructional strategies for encouraging communitity involvement and global awareness for social studies students can be the following. In middle or high school, an annual event

asked by troyer0269 on November 14, 2008
4. ### AED 200

Read the following scenario: You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4

asked by Dawn on February 3, 2008
5. ### education

Read the following scenario: You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4

asked by kristin on September 16, 2012
6. ### AE

Read the following scenario: You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4

asked by scooby91320002 on March 12, 2009

A history class is comprised of 6 female and 9 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students will be

asked by Jonathan on August 30, 2016
8. ### AED200

Read the following scenario: You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4

asked by Jenny on May 24, 2009
9. ### statistics: dependent event

A psychology class is comprised of 4 female and 6 male students. If the instructor of the class randomly chooses 6 students from the class for an oral exam, what is the probability that 2 female students and 4 male students will

asked by John on February 22, 2011
10. ### Statistics

A history class is comprised of 5 female and 8 male students. If the instructor of the class randomly chooses 8 students from the class for an oral exam, what is the probability that 2 female students and 6 male students will be

asked by Ryan on March 10, 2015

More Similar Questions