1.There were 5000 beads in a container.Out of 25 beads,13 we

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1.There were 5000 beads in a container.Out of 25 beads,13 were gold and 12 were silver.Which is the best estimate of the total number of gold beads in the container?(此题翻译一下）
2.In a scale drawing,1 centimeter represents 200 meters.How many square centimeters on the drawing represent 10 square meters?

容器中有5000个珠子,随机取出25个,其中有13个是金色的,12个是银色的,问容器中可能有多少个金色球?

在一个比例图总,1厘米代表200米.有多少平方厘米图上代表10平方米.
1平方厘米,代表的是40000平方米
设x平方厘米图上代表10平方米.
1/40000=x/10
x=1/4000

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