To complete the table, we need to find the missing values. Observing the given values, we can see that the number of girls is always 2.5 times the number of boys. Therefore, when the number of boys is 10, the number of girls will be \( 10 \times 2.5 = 25 \), and when the number of boys is 8, the number of girls will be \( 8 \times 2.5 = 20 \).
Next, we find the ratio of the number of boys to the number of girls. Taking any column as an example, say the first column where there are 2 boys and 5 girls, the ratio of boys to girls is \( \frac{2}{5} \) or 2:5.
To find the fraction of the number of boys to the number of girls, we use the ratio we found, which is 2:5, and write it as a fraction, \( \frac{2}{5} \).
Penjelasan dengan langkah-langkah:
Jawaban【Answer】:
1.
(a)
Table:
\[
\begin{array}{|c|c|c|c|c|c|c|}
\hline
\text{Number of Boys} & 2 & 4 & 6 & 8 & 10 & 12 \\
\hline
\text{Number of Girls} & 5 & 10 & 15 & 20 & 25 & 30 \\
\hline
\end{array}
\]
Ratio: 2:5
Fraction: \( \frac{2}{5} \)
【Explanation】:
1.
(a)
To complete the table, we need to find the missing values. Observing the given values, we can see that the number of girls is always 2.5 times the number of boys. Therefore, when the number of boys is 10, the number of girls will be \( 10 \times 2.5 = 25 \), and when the number of boys is 8, the number of girls will be \( 8 \times 2.5 = 20 \).
Next, we find the ratio of the number of boys to the number of girls. Taking any column as an example, say the first column where there are 2 boys and 5 girls, the ratio of boys to girls is \( \frac{2}{5} \) or 2:5.
To find the fraction of the number of boys to the number of girls, we use the ratio we found, which is 2:5, and write it as a fraction, \( \frac{2}{5} \).