Hi

*Note average = sum of the scores /total matches

43.9 = Sum of the ten scores/10

53 = Sum of those first six scores/6

write as we read, letting x be the average for the last four matches

sum of the first scores is 6*53 = 318

43.9 = (318 + x)/10

439 = 318 + x

121 = x

121/4 = 30.25

Answer c would be the correct choice



 

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