Question 1151324
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Literally, "23 choose 20".<br>
Use a calculator if necessary; many good calculators (like the TI83) have functions built in to calculate "n choose r" numbers.<br>
To do the calculation manually, note that 23 choose 20 is the same as 23 choose 3 (the coach is choosing 3 of the 23 to NOT be on the team).  Then the calculation is<br>
{{{(23*22*21)/(3*2*1) = 23*11*7 = 1771}}}<br>