February 2019 0 68 Report
Średnia arytmetyczna liczb: 8, 11, 6, 5, p, q, 8, 6, 11, 12 jest równa 8,7. Suma  \frac{1}{2} p + \frac{1}{2} q jest więc równa:
a. 7
b. 8
c. 9
d. 10
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