जॉइन Examsbookउत्तर : 1. "105"
There are three rooms in a Hotel: one single, one double and one for four persons. How many ways are there to house seven persons in these rooms ?5
प्र: There are three rooms in a Hotel: one single, one double and one for four persons. How many ways are there to house seven persons in these rooms ?
- 1105true
- 27! x 6!false
- 37!/5!false
- 4420false
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उत्तर : 1. "105"
व्याख्या :
Answer: A) 105 Explanation: Choose 1 person for the single room & from the remaining choose 2 for the double room & from the remaining choose 4 people for the four person room, Then, 7C1 x 6C2 x 4C4 = 7 x 15 x 1 = 105