A picnic is being planned in a school for class VII. Girls are 60% of the total number of students and are 18 in number. Find the number of boys.

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answer is B.

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Detailed Solution

Concept: Let's assume total number of students be ${"mathml":"<math class="image_resized" style="width:8px;height:7px"><span style="font-family:$ .
Girls are ${"mathml":"<math class="image_resized" style="width:32px;height:11px"><span style="font-family:$ .
As given, ${"mathml":"<math class="image_resized" style="width:32px;height:11px"><span style="font-family:$ of ${"mathml":"<math class="image_resized" style="width:8px;height:7px"><span style="font-family:$ is 18.
So,

So, total students are 30.
So, the number of boys ${"mathml":"<math class="image_resized" style="width:120px;height:11px"><span style="font-family:$ Hence, the correct answer is 2.[13]

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