Question 862221
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Hi
{{{20}}} students:11 from Grade 12 and 9 from Grades 9-11
How many ways can a 6 member student council be formed if:
 a) There are no restrictions {{{20C6}}}
 b) There must be 3 Grade 12's and 3 from the other grades {{{(11C3)(9C3)}}}
 c) There can only be one or two Grade 12's {{{ (11C1)(9C5)+ (11C2)(9C4) }}}