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MCQ (Single Correct Answer)
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There are n white and n black balls marked 1, 2, 3, ...... n. The number of ways in which we can arrange these balls in ...
WB JEE 2022
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What is the number of ways in which an examiner can assign 10 marks to 4 questions, giving not less than 2 marks to any ...
WB JEE 2021
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Five letter words, having distinct letters, are to be constructed using the letters of the word 'EQUATION' so that each ...
WB JEE 2021
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If the total number of m-element subsets of the set A = {a1, a2, ..., an} is k times the number of m element subsets con...
WB JEE 2020
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In a 12 storied building, 3 persons enter a lift cabin. It is known that they will leave the lift at different floors. I...
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There are 7 greeting cards, each of a different colour and 7 envelopes of same 7 colours as that of the cards. The numbe...
WB JEE 2019
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A candidate is required to answer 6 out of 12 questions which are divided into two parts A and B, each containing 6 ques...
WB JEE 2019
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From a collection of 20 consecutive natural numbers, four are selected such that they are not consecutive. The number of...
WB JEE 2018
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If (2 $$ \le $$ r $$ \le $$ n), then $${}^n{C_r}$$ + 2 . $${}^n{C_{r + 1}}$$ + $${}^n{C_{r + 2}}$$ is equal to
WB JEE 2018
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The number of selection of n objects from 2n objects of which n are identical and the rest are different, is
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Out of 7 consonants and 4 vowels, words are formed each having 3 consonants and 2 vowels. The number of such words that ...
WB JEE 2017
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The number of all numbers having 5 digits, with distinct digits is
WB JEE 2017
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$${}^{15}{C_3} + {}^{15}{C_5} + \,\,......\,\, + {}^{15}{C_{15}} = $$
WB JEE 2011
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The number of diagonals in a polygon is 20. The number of sides of the polygon is
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If $${}^n{C_4}$$, $${}^n{C_5}$$ and $${}^n{C_6}$$ are in A.P., then n is
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If $${}^{n - 1}{C_3} + {}^{n - 1}{C_4} > {}^n{C_3}$$, then n is just greater than integer
WB JEE 2010
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The number of permutations by taking all letters and keeping the vowels of the word COMBINE in the odd places is
WB JEE 2010
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A polygon has 44 diagonals. The number of the sides is
WB JEE 2009
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The number of ways four boys can be seated around a round table in four chairs of different colours is
WB JEE 2008
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How many odd numbers of six significant digits can be formed with the digits 0, 1, 2, 5, 6, 7 when no digit is repeated?...
WB JEE 2008
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Out of 8 given points, 3 are collinear. How many different straight lines can be drawn by joining any two points from th...
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MCQ (More than One Correct Answer)
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On the occasion of Dipawali festival each student of a class sends greeting cards to others. If there are 20 students in...
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Subjective
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How many triangles can be formed by joining 6 points lying on a circle?
WB JEE 2011
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