SOLUTION :
Let N be the number of ways.
So,
a.
When order is not relevant :
N(7 out of 11 without replacement) order of arrangement of 7 chosen is not relevant.
= (11 *10 * 9 * 8 * 7 * 6 * 5 ) / 7! ways
= 330 ways (ANSWER)
b.
When order is relevant :
N(7 out of 11 without replacement)
= (11 *10 * 9 * 8 * 7 * 6 * 5 ) ways
= 1663200 ways (ANSWER)
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I also need help with the other two, please provide an
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