JEE Main On 08 April 2018 Question 28
Question: From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on a shelf so that the dictionary is always in the middle. The number of such arrangements is: [JEE Main Online 08-04-2018]
Options:
A) at least 500 but less than 750
B) at least 750 but less than 1000
C) at least 1000
D) less than 500
Show Answer
Answer:
Correct Answer: C
Solution:
$ \text{6 }{N_1}\text{ 3D} $
$ \text{=15}\text{.3}\text{.24} $
$ \text{=45}\times 24 $ $ =1080 $
