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Mathematics 20 Online
OpenStudy (anonymous):

I am going to choose 6 students out of the 15 who currently have A's to be mentors for the students who have C's or lower. How many ways can a group of 6 be selected?

OpenStudy (alexwee123):

|dw:1343977571380:dw|

OpenStudy (anonymous):

i have no idea

OpenStudy (alexwee123):

this might help :) |dw:1343977665844:dw|

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