一组数据中,有6个30,5个32,1个33,2个34,下面哪个算式是求这组数据的平均数( )
A.(30+32+33+34)÷4 | B.(6+30+5+32+1+33+2+34)÷4 |
C.(30×6+32×5+33+34×2)÷14 | D.(30×6+32×5+33+34×2)÷4 |
一组数据中,有6个30,5个32,1个33,2个34,下面哪个算式是求这组数据的平均数( )
A.(30+32+33+34)÷4 | B.(6+30+5+32+1+33+2+34)÷4 |
C.(30×6+32×5+33+34×2)÷14 | D.(30×6+32×5+33+34×2)÷4 |