Advertisements
Advertisements
प्रश्न
Choose the correct alternative:
The number of rectangles that a chessboard has ______
विकल्प
81
99
1296
6561
Advertisements
उत्तर
1296
APPEARS IN
संबंधित प्रश्न
If nPr = 1680 and nCr = 70, find n and r.
There are 18 guests at a dinner party. They have to sit 9 guests on either side of a long table, three particular persons decide to sit on one side and two others on the other side. In how many ways can the guests to be seated?
A committee of 5 is to be formed out of 6 gents and 4 ladies. In how many ways this can be done when
- atleast two ladies are included.
- atmost two ladies are included.
The value of n, when np2 = 20 is:
If nPr = 720(nCr), then r is equal to:
The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is:
There are 10 true or false questions in an examination. Then these questions can be answered in
The value of (5C0 + 5C1) + (5C1 + 5C2) + (5C2 + 5C3) + (5C3 + 5C4) + (5C4 + 5C5) is:
If nC12 = nC9 find 21Cn
Prove that 15C3 + 2 × 15C4 + 15C5 = 17C5
A trust has 25 members. How many ways 3 officers can be selected?
How many ways a committee of six persons from 10 persons can be chosen along with a chair person and a secretary?
There are 5 teachers and 20 students. Out of them a committee of 2 teachers and 3 students is to be formed. Find the number of ways in which this can be done. Further find in how many of these committees a particular teacher is included?
Find the number of ways of forming a committee of 5 members out of 7 Indians and 5 Americans, so that always Indians will be the majority in the committee
A committee of 7 peoples has to be formed from 8 men and 4 women. In how many ways can this be done when the committee consists of at most 3 women?
How many triangles can be formed by joining 15 points on the plane, in which no line joining any three points?
There are 11 points in a plane. No three of these lie in the same straight line except 4 points which are collinear. Find the number of triangles that can be formed for which the points are their vertices?
A polygon has 90 diagonals. Find the number of its sides?
Choose the correct alternative:
In 2nC3 : nC3 = 11 : 1 then
