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edu Logged in as apauliso WeBWorK MAA MATHEMATICAL ASSOCIATION OF AMERICA 75 MAIN MENU ExtraCredit: Problem 5 ExtraCredit Previous Problem Problem LUst Next Problem (1ponO Rework protiem 7om section 23or your teat Assume that thandent hat "cup with t2wming penclils, 4 ball point pens, and 2 felt-tip pens (1) In how many ways can the student select 8 wirting implements h, how many ways can the selection be madeno moreha, one bal port pen selected? 34 Note: You can eam partial creit on this problem Preview My AnswersSubmit Anawers You have unlimed aftempts remaining

Explanation / Answer

a) Number of ways of selecting 8 writing implements = 12C8 = 495

b) Number of ways of selecting 8 writing implements so that no more than 1 ball paint is selected

= Ways that 0 ball pen is selected + Ways that 1 ball pen is selected

= 10C8 + 2C1 * 10C7

= 285

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