Given that 12,v,w,x,y,z is an arithmetic sequence whose median is 20.75, what is the sum of these six numbers? Express your answer as a decimal to the nearest tenth.

Given that
12,v,w,x,y,z is an arithmetic sequence whose median is 20.75, what is the sum
of these six numbers? Express your answer as a decimal to the nearest tenth.

w+x =41.5

12, 12+d, 12+2d,….12+5d

Sum =72+15d

w =12+2d

x=12+3d

w+x =24+5d

24+5d =41.5

72+15d = 124.5

Sum is 124.5

Oct 5th, 2014

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