Class Twelve: Maths

2 Notes
5 Questions
0 MCQs

Basic Principle of Counting

Fundamental Principle of Counting Let us consider the following problem. Dipesh has 3 pants and 2 shirts. How many different pairs of a pant and a shirt, can he dress up with? There are 3 ways in w...

Permutations and Combinations

1.Permutationsc. Circular PermutationsGetting the same order only directionally-inversed, they can be regarded as the same and in this case the formula is divided by 2 i.e. 1/2(n-1)! d. Permutation...

In a certain city there are n straight streets, such that every two streets intersect, and no three streets pass through the same intersection. The City Council wants to organize the city by design...

Committee of 4 men and 3 women is to be formed from among 6 men and 8 women. But miss A refuses to be a member if Mr. D is a member. Then the number of ways in which the committee can be formed is ...

( 6C4 * 8C3 ) - (5C3 * 7C2) = 630
Answer: Non of the above

If C(8,r) - C(7,3) = C(7,2) , then r = a. 3 b. 3 or 5c. 5 or 7 d. 7

In how many ways can eight people be seated in a round table if two people insist in sitting next to each other?

From 6 gentlemen and 4 ladies a committee of 5 is to be formed. In how many ways can this be done so as to include at least 3 ladies?

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