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प्रश्न
Deepti went to school for 216 days in a full year. If her attendance is 90%, find the number of days on which the school was opened.
उत्तर
Let the school opened for x days in the given year.
We have:
90 % of x = 216
\[ \Rightarrow \frac{90}{100}x = 216\]
\[ \Rightarrow x = \frac{216 \times 100}{90}\]
\[ = 240\]
∴ The school opened for 240 days in the given year.
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