जॉइन Examsbookउत्तर : 4. "240"
In the below word how many words are there in which R and W are at the end positions?
RAINBOW5
प्र: In the below word how many words are there in which R and W are at the end positions? RAINBOW
- 1120false
- 2180false
- 3210false
- 4240true
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उत्तर : 4. "240"
व्याख्या :
Answer: D) 240 Explanation: When R and W are the first and last letters of all the words then we can arrange them in 5!ways. Similarly When W and R are the first and last letters of the words then the remaining letters can be arrange in 5! ways. Thus the total number of permutations = 2 x 5! = 2 x 120 = 240
समान प्रश्न
Since Nithya and Suganya exchange places, so Rita’s new position is the same as Monika’s earlier position. This position is 17th from the right and 10th from the left. Therefore Number of girls in the row = (16 + 1 + 9) = 26.