well the answer is 84.6 how we get the answer is adding up all of the variables 63, 79, 89, 93, 99 and we get 423 now we divid that total by the amount of varibles in this case 5 and we get our answer 84.6
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79+82+93+91+100=445/5=89
75.4 is the average.
618/7 = 88.28571429% or 88% correct to 2 significant figures.
It is 18.
The average is defined as the sum of the data points divided by the number of data points. In this instance (89 + 93 + 141)%/3 = 108 %, to the justified number of significant digits.