MEDIUM
CUSAT CAT
IMPORTANT
Earn 100
From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on the shelf so that the dictionary is always in the middle. Then the number of such arrangement is
(a)At least 500 but less than 750
(b)At least 750 but less than 1000
(c)At least 1000
(d)Less than 500
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Important Questions on Permutation and Combination
MEDIUM
CUSAT CAT
IMPORTANT
The largest non-negative integer such that divides is
HARD
CUSAT CAT
IMPORTANT
How many odd numbers of six significant digits can be formed with the digits when no digit is repeated?
MEDIUM
CUSAT CAT
IMPORTANT
The number of distinct primes dividing Is
MEDIUM
CUSAT CAT
IMPORTANT
If , then is equal to -
HARD
CUSAT CAT
IMPORTANT
The number of sides of a polygon with diagonals is
MEDIUM
CUSAT CAT
IMPORTANT
-similar balls each of weight when weighed in pairs the sum of the weights of all possible pairs is when they are weighed in triplets the sum of the weights comes out to be for all possible triplets, then is
MEDIUM
CUSAT CAT
IMPORTANT
From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on the shelf so that the dictionary is always in the middle. Then the number of such arrangement is
