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78=9+18+14+32+y
78=73+y
y=78-75
y=5
b)median =suku ke-6 + suku ke-7 di bagi 2
=6+7/2
=13/2
=6,5
73+y/12=6,5
73+y=6,5 x 12
y=78-73
y=5
b. 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 8, 8
median = 6+7 /2
6,5