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10: 1
14: 2
12: 2
13: 1
15: 1
a) karena modus paling banyak angka 12 berarti a: 12
10,12,12,12,13,14,14,15
b) median 12+13/2= 12.5
mean 10+12+12+12+13+14+14+15/8= 102/8= 12,75
maaf kalo salah, semoga membantu