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The average test score of 15 students was 85. One score was dropped, changing the mean of the remaining scores to 86. What score was dropped?Help!!!!!!!!!!!!! i ll put brainliest

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joshuaedwardhall

Answer:

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The score that dropped the average is 15.

What is an Average?

Average is the mean of the data set obtained by summing all the values of the data set and then dividing it by the number of data in the set.

The average test score of 15 students was 85.

Let the score that dropped is x

New mean = 86

Let the sum of the scores is y, then,

Average = y / 15

85 * 15 = y

y = 1275

(1275 +x)/15 = 86

1275 +x = 1290

x = 15

know more about Average

brainly.com/question/24057012

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