# PERMUTATION & COMBINATION | IIT JEE CONCEPTS | Part 7 | JEE Main 2014 | AIEEE 2009 | Gap Method - Videos

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In this video, we will learn an important concept of arrangement – Arrange n objects in n places, so that r objects are always separated or not together – THE GAP METHOD.

Questions Discussed
JEE Main 2014
Suppose that, six students, including Madhu and Puja are having six beds arranged in a row. Further, suppose that Madhu does not want a bed adjacent to Puja. The number of ways, the beds can be allotted to students is
(A) 384 (B) 264 (C) 480 (D) 600

AIEEE 2009
How many different words can be formed by jumbling the letters in the word MISSISSIPPI in which no two S are adjacent?
(A) 8 × 6C4 × 7C4 (B) 42 × 8C4 (C) 48 × 7C4 (D) 7 × 6C4 × 8C4

TRY YOURSELF Question
IIT JEE 2002
The number of arrangements of the letters of the word BANANA in which two N’s do not appear adjacently is
(A) 40 (B) 60 (C) 80 (D) 100

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