#### Answer

286, 378

#### Work Step by Step

No. of free samples = 13
If customer makes exactly 3 requests = 13C3 = 286
If customers makes up to 3 requests = 13C0 + 13C1 + 13C2 + 13C3 = 378

Published by
McGraw-Hill Education

ISBN 10:
0078136334

ISBN 13:
978-0-07813-633-7

286, 378

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