document.write( "Question 1089626: You roll two six-sided dice. What is the probability that the sum is odd or a multiple of 5? Round the answer to the nearest tenth of a percent. \n" ); document.write( "
Algebra.Com's Answer #703973 by reviewermath(1029) You can put this solution on YOUR website! You roll two six-sided dice. What is the probability that the sum is odd or a multiple of 5? Round the answer to the nearest tenth of a percent.\r \n" ); document.write( "\n" ); document.write( "Solution: \n" ); document.write( "Let A = event that the sum is odd \n" ); document.write( "B = event that the sum is a multiple of 5 \n" ); document.write( "A = {(1,2), (1,4), (1,6), (2, 1), (2,3), (2,5), (3,2), (3,4), (3,6), (4,1), (4,3), (4,5), (5,2), (5,4), (5,6), (6,1), (6,3), (6,5)} \n" ); document.write( "There are 18 elements in set A\r \n" ); document.write( "\n" ); document.write( "B = {(1,4), (2,3), (3,2), (4,1), (4,6), (5,5), (6,4)}\r \n" ); document.write( "\n" ); document.write( "There are 7 elements in set B\r \n" ); document.write( "\n" ); document.write( "A AND B = {(1,4), (2,3), (3,2), (4,1)} \n" ); document.write( "There are 4 elements in set A AND B (intersection)\r \n" ); document.write( "\n" ); document.write( "Since there are \n" ); document.write( "\n" ); document.write( "P(A OR B) = P(A) + P(B) - P(A and B) \n" ); document.write( " = (18/36) + (7/36) - (4/36) = 21/36 or |