Find the missing number for the scores, 21,14,19,----,13,15,18 if the mean score is 18.
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Answer:
The number is 26
Step-by-step explanation:
let the number be x
according to the question
( 21 + 14 + 19 + x + 13 + 15 + 18 ) / 7 = 18
( 100 + x ) / 7 = 18
100 + x = 126
x = 126 - 100
x = 26
hope it helps you
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