At the district competition for 5th grade jump-roper of the year, the following number of jumps without stopping were recorded per student:

203,245,237,233,90,100,100,277,265, 264,265,285,288,291,
291,290,300,224,200,257,290,279,266 ,288

what is the mean number of jumps, rounded to the nearest hundredth?

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

The answer is $9.90 with rounding to the nearest tenth