2013 AMC 12A Problems/Problem 5: Difference between revisions

Revision as of 21:34, 6 February 2013

Add up the amounts that Tom, Dorothy, and Sammy paid to get $ $405$ , and divide by 3 to get $ $135$ , the amount that each should have paid.

Tom, having paid $ $105$ , owes Sammy $ $30$ , and Dorothy, having paid $ $125$ , owes Sammy $ $10$ .

Thus, $t - d = 30 - 10 = 20$ , which is B

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	Tom, having paid $<math>105</math>, owes Sammy $<math>30</math>, and Dorothy, having paid $<math>125</math>, owes Sammy $<math>10</math>.		Tom, having paid $<math>105</math>, owes Sammy $<math>30</math>, and Dorothy, having paid $<math>125</math>, owes Sammy $<math>10</math>.

	Thus, <math>t - d = 30 - 10 = 20</math>.		Thus, <math>t - d = 30 - 10 = 20</math>, which is B