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# This is a really hard math riddle. CAN YOU SOLVE IT? Probably not...

Wed 17 Nov, 2010 05:23 pm
On the last day of the first grading period Michael learns his grade for each class. If order doesn't matter and we know he has at least 1 of each of the 5 letter grades ( a b c d e) what is the total number of combinations of 7 final grades ( one for each class) that Michael can possibly receive for the first grading period?
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JPLosman0711

1
Wed 17 Nov, 2010 06:32 pm
13................
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1
Wed 17 Nov, 2010 08:38 pm
@kaykay999,
Wild guess is it 7 cubed times 4 factorial?
laughoutlood

1
Wed 17 Nov, 2010 09:09 pm
yes that was wild, the answer is 5 cubed times 4 factorial
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