Determine what number would bring the average to 250
18.5 lbs
68.5 lbs
63 lbs
65 lbs
22.5 lbs
21.5 lbs
55 lbs
83 lbs
4 lbs
To determine what additional number is needed to bring the average weight to 250, first find the sum of all the given weights:
18.5 + 68.5 + 63 + 65 + 22.5 + 21.5 + 55 + 83 + 4 = 341 lbs
Now, calculate the average by dividing the total sum by the number of weights given:
341 / 9 = 37.89 lbs
To bring the average to 250, the total sum of weights would need to be 250 * 9 = 2250 lbs
So, the additional weight needed would be:
2250 - 341 = 1909 lbs
Therefore, adding 1909 lbs would bring the average weight to 250 lbs.