justintye5655 justintye5655

19-08-2022
Mathematics

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The average (arithmetic mean) of t and y is 15, and
the average of w and x is 15. What is the average of
t, w, x, and y ?
(A) 7.5
(B) 15
(C) 22.5
(D) 30
(E) 60

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