InterviewSolution
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InterviewSolution
| 1. |
P, Q, R, S are to give lecture to an audience. The organizer can arrange the order of their presentation in : (a) 256 ways (b) 24 ways (c) 4 ways (d) 12 ways |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) 24 ways</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Since there are 4 people P, Q, R, S who are to give lecture to an audience. </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">∴ The number of ways in which their presentation can be arranged </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">= 4 ! = 4 × 3 × 2 × 1 = 24.</span></span></p> | |