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Serenity has a collection of 140 coins. How many coins represent
10% of her collection?
Answer:

Serenity has a collection of $140$ coins. How many coins represent $10 \%$ of her collection? $\newline$ Answer:

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Identify representative, random, and biased samples

Full solution

Q. Serenity has a collection of

140

coins. How many coins represent

10 \%

of her collection?

\newline

Answer:

Calculate $10$ % of $140$ : To find $10$ % of Serenity's collection, we need to calculate $10\%$ of $140$ coins. $\newline$ We use the formula: $(\text{Percentage} / 100) \times \text{Total number of items}$ . $\newline$ So, $(10 / 100) \times 140 = 0.10 \times 140$ .
Perform multiplication: Now, we perform the multiplication to find the number of coins. $0.10 \times 140 = 14$ .
Check calculation: We check the calculation to ensure there's no math error. $10\%$ of $100$ is $10$ , and $10\%$ of $40$ is $4$ , so $10\%$ of $140$ should indeed be $14$ .

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