In a computer lab, there are 3 computers for every 6 students. How many computers will be needed for 24 students?

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answer is C.

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Detailed Solution

Concept- The unitary method formula says to find the value of a single unit and then multiply the value of a single unit by the number of units to get the necessary value. By using the unitary approach, we can resolve this. First, we must determine how many students will use each computer, which can be done by dividing the entire number of students by the total number of computers. Next, we must determine how many computers will be needed to accommodate 24 students. It is stated in the question that there are 3 computers for the 6 pupils. According to this logic, two students share each computer. Therefore, it is easy to figure out how many computers 24 students may share.
Step 1- As the number of computers required for 6 students is 3. Therefore, the number of computers required by 1 student = 36 = 12
Step 2- Therefore, the number of computers required by 24 students =24 × 12
i.e. The number of computers required by 24 students will be 12. Hence, the correct answer option is 3) 12

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