21-05-2020
Mathematics

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22-05-2020

Answer:

Step-by-step explanation:

a) Colin's mean score:

Add up the 10 given run scores and then divide the sum by 10:

(18 + 12 + 6 + 1 + 21 + 10 + 21 + 18 + 20 + 7) / 10, or

134 / 10. Thus, Colin's mean score was 13.4.

b) After Colin has played his 11th game, his average becomes:

134 + 9

----------- = 143/11 = 13

11

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