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15) In the AP Chemistry class, the average age of 19 students is 16.21. A foreign exchange student is
added a month after the class starts and has an age of 17. What is the new average of the AP Chemistry class?
(A) 16.05
(B) 16.22
(C) 15.40
(D) 16.25
(E) 16.89

Sagot :

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