五年级参加数学竞赛,女生有12人,比男生参赛的人数少三分之二。比赛结果,获奖人数占参赛人数的八分之七,

获奖的有几人
2024-12-03 10:37:40
推荐回答(4个)
回答1:

少三分之二,即女生只占男生的三分之一,故男生有36人参赛。
共12+36=48,获奖人数48*(7/8)=42

回答2:

获奖的有42个人。因为女生有12人,比男生参赛的人数少三分之二,说明女生参赛人数是男生参赛人数的三分之一,女生有12人,则男生有36人,共48人。获奖人数占参赛人数的八分之七,则获奖的有42人。

回答3:

第一步,数学竞赛女生有12人,相当于男生参加人数的三分之二,那么男生的人数=12÷(三分之二)=18人。 第二步,男生18人,女生12人,那么参赛总人数=12+18=30 第三步,获奖的人数占参赛人数百分之七十,获奖人数=30×70%=21 答案是21人
男生人数=12÷2/3=18(人)
获奖人数=(12+18)×70%=21(人)
答:获奖的有21人。

回答4:

42

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