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It refers to the outer terms in a proportiona) extremesb) meansc) proportiond) ratio​

The mass of a chocolate truffle is 0.025 kg, correct to 2 significant figures. what is the smallestpossibel mass of the chocolate truffle​

There are 27 photocards in an album. 9 of them are rare signed, 3 are normal variant signed and the rest are unsigned. what fraction of the photocards is unsigned? ​