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Quantitative Aptitude MCQ - Permutation And Combinations

26 Total number of words formed by 2 vowels and 3 consonants taken from 4 vowels and 5 consonants is equal to

27 The number of different permutations of the word BANANA is

28 There are four bus lines between A and B; and three bus lines between Band C.

The number of way a person round trip by bus from A to C by way of B will be

There are four ways to go from A to B and three ways to go from B to C, Hence there are 4 x 3 = 12 ways to go from A to C by way of B

29 In how many ways can 5 red and 4 white balls be drawn from a bag containing 10 red and 8 white balls?

30 The number of diagonals that can be drawn by joining the vertices of an octagon is

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Question:

Six teachers and six students have to sit round a circular table such that there is a teacher between any two students. The number of ways in which…

A. 6 ! x 6 !
B. 5 ! x 6 !
C. 5! x 5!
D. none of these

Correct answer: D

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