懂英文和数学的来!百分数问题.
InalloyAandalloyB,thereare30%and40%ofironinweightrespectively.Nowanewalloyisformedby6kgofalloyAand2kgofalloyB.Inthenewalloy,
(a)whatistheweightofiron?
(b)whatpercentageofweightisiron?
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