1)(28+36+19+41)/4=31
2)(136+140+147)/3=141
3)(115+116+169+100+120)/5=124
4)(245+1106+1069+2008)/4=1107
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1)(28+36+19+41)/4=31
2)(136+140+147)/3=141
3)(115+116+169+100+120)/5=124
4)(245+1106+1069+2008)/4=1107
2) (136+140+147):3=141
3) (115+116+169+100+120):5=124
4 (245+1106+1069+2008):4=1107
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