जॉइन Examsbookउत्तर : 3. "48 minutes"
Between two book-ends in your study are displayed your four favourite love story books. If you decide to arrange the four books in every possible combination and moved just one book every minute, how long would it take you ?5
प्र: Between two book-ends in your study are displayed your four favourite love story books. If you decide to arrange the four books in every possible combination and moved just one book every minute, how long would it take you ?
- 154 minutesfalse
- 232 minutesfalse
- 348 minutestrue
- 424 minutesfalse
- उत्तर देखेंउत्तर छिपाएं
- Workspace
उत्तर : 3. "48 minutes"
व्याख्या :
Answer: C) 48 minutes Explanation: Possible arrangements for 4 books are 4x3x2x1 = 24For making a new arrangement, two books are required to be moved.One book takes one minute, then for 2 booksSo total 24 x 2 = 48 mins.