document.write( "Question 1020075: A set of five 2-digit whole numbers has a mean of 16, a mode of 13, and a median greater than the mean. What is the largest possible value of the set? \n" ); document.write( "
Algebra.Com's Answer #636029 by LinnW(1048) You can put this solution on YOUR website! Since the mode is 13, we have at least two numbers in the set with value 13. \n" ); document.write( "We are given that the median is greater than 16. Since there are five \n" ); document.write( "numbers in the set, the third highest number is the median. \n" ); document.write( "So the first two numbers are 13 13 . \n" ); document.write( "Since the median is greater than 16, it must be at least 17. \n" ); document.write( "Suppose the third number is 17. \n" ); document.write( "Since the mean is 16, the sum of the 5 numbers must be 5*16 = 80 \n" ); document.write( "Let Z represent the sum of the two remaining numbers. \n" ); document.write( "13 + 13 + 17 + Z = 80 \n" ); document.write( "43 + Z = 80 \n" ); document.write( "Z = 37 \n" ); document.write( "Since each of the two numbers must be 2 digits and >= 17, the two \n" ); document.write( "numbers must be 18 and 19. \n" ); document.write( "This makes our set 13 13 17 18 19 \n" ); document.write( "Now we need to determine if the median can be greater than 17. \n" ); document.write( "Try 18 for the median. \n" ); document.write( "If Z once again represents the sum of the remaining two numbers, \n" ); document.write( "13 + 13 + 18 + Z = 80 \n" ); document.write( "44 + Z = 80 \n" ); document.write( "Z = 36 \n" ); document.write( "This would make the two numbers 18 and 18, but this is impossible \n" ); document.write( "since this would make the mode to be 18. \n" ); document.write( "Try 19 for the median. \n" ); document.write( "If Z once again represents the sum of the remaining two numbers, \n" ); document.write( "13 + 13 + 19 + Z = 80 \n" ); document.write( "45 + Z = 80 \n" ); document.write( "Z = 35 \n" ); document.write( "This would make the two numbers 17 and 18, but this makes \n" ); document.write( "19 not the median. \n" ); document.write( "Clearly any integer larger also would not work. \n" ); document.write( "So our set is 13 13 17 18 19 \n" ); document.write( " |