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If in a computer lab, there are 3 computers for every 6 students, then how many computers will be needed for 24 students?

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answer is B.

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Detailed Solution

Given that in a computer lab, for every 6 students there are 3 computers.
i.e.

6 s t u d e n t s = 3 c o m p u t e r s

⇒ 1 s t u d e n t = 36 c o m p u t e r s

⇒ 1 s t u d e n t = 12 c o m p u t e r

Find the number of computers for 24 students.

∵ 1 s t u d e n t = 12 c o m p u t e r

⇒ 24 s t u d e n t s = 12 × 24 c o m p u t e r

⇒ 24 s t u d e n t s = 12 c o m p u t e r

Therefore, for 24 students, 12 computers will be needed.
Hence, option (2) is correct.

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