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In how many types ways can five different examination papers of maths, physics, chemistry, computer an physical education be arranged so that physics and chemistry papers never come together.A. `54`B. `120`C. `48`D. `72` |
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Answer» Correct Answer - D Total arrangement of papers are `=5!=120` when physics and chemistry come together `=4!xx2!=48`. Hence, Required number of ways are `=120-48=72` |
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