右边条形图是从曙光中学800名学生中帮助四川地震失学儿童捐款金额的部分抽样调查数据,扇形图是该校各年级人数比例分布图.那

1个回答

  • 800×36%=288(人);

    4+8+10+16+12=50(人);

    4÷50=

    4

    50 ;

    8÷50=

    8

    50 ;

    10÷50=

    10

    50 ;

    16÷50=

    16

    50 ;

    12÷50=

    12

    50 ;

    288×

    4

    50 ×5,

    =23.04×5,

    =115.2(元);

    288×

    8

    50 ×10,

    =46.8×10,

    =468(元);

    288×

    10

    50 ×15,

    =57.6×15,

    =864(元);

    288×

    16

    50 ×20,

    =92.16×20,

    =1843.2(元);

    288×

    12

    50 ×25,

    =69.12×25,

    =1728(元);

    115.2+468+864+1843.2+1728,

    =583.2+864+1843.2+1728,

    =1447.2+1843.2+1728,

    =3290.2+1728,

    =5018.2,

    ≈5010(元).

    故答案选:C.

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