Jawabanmu

2014-04-17T11:53:19+07:00
Mean = n f / f
7 = (5×4) + 6p + (7×14) + (8×12) + (9×2) / (4+p+14+12+2)
7 = 20 + 6p + 98 + 96 + 18 / 32 + p
7 = 232 + 6p / 32 + p

Dikali silang
224 + 7p = 232 + 6p
7p-6p = 232-224
p=8
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