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b1az3:
There are 20 students on the school's student council. A special homecoming dance committee is to be formed by randomly selecting 7 students from student council. How many possible committees can be formed? 390,700,800 5,040 77,520
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jhonyy9:
\[C_{20}^{7} = ? \] do you know this ?
jhonyy9:
@AZ
jhonyy9:
@b1az3
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