Question

The average of 13 scores is 8. If one of the scores 20 is deleted from them, then the average of the remaining scores is

Answer 1

$Given \: average \: of \: 13 \: scores = 8$

$\blue { Sum \:of \: 13 \: scores } \\= 13 \times 8\\= 104$

/* According to the problem given */

$\red{Deleted \: score = 20}$

$Sum \: of \: 12 \:scores \\= 104 - 20 \\= 84$

$Number \: of \: scores = 12$

$\green { New \: average \:score } \\= \frac{Sum \: of \: 12 \:scores}{Number \: of \: scores} \\= \frac{84}{12} \\= 7$

Therefore.,

$\red { New \: average \:score }\green { = 7}$

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