某体育文化用品店排球和篮球的进价和售价如下表1所示:

1个回答

  • (1)由题意,得

    95×0.88-80=3.6元,

    n(60×0.92-50)=5.2n元,

    故答案为:3.6,5.2n

    (2)设该中学买了篮球x个,则排球(50-x)个,当0<x<26时,

    (95×0.95-80)x+(60×0.9-50)(50-x)=305,

    解得:x=16.8(不符合题意,舍去)

    当x≥26时,

    (95×0.9-80)x+(60×0.95-50)(50-x)=305,

    解得x=30,

    ∴排球买了50-30=20个

    答:篮球买了30个,排球买了20个.