Question
Salman has a list of 12 friends. He wishes to invite
some of them in such a manner that he can enjoy maximum number of parties, but in each party the numberof  friends (i.e., invitees) be same and each party must have different set of person. Then how many parties can Salman?Solution
If n is even, nCr is maximum when r = n/2 Â Number of invitees in a party = 12/2 = 6 and Maximum possible number of parties = 12C6 = 924Â Â Â Â Â Â Â
The circumference of the two circles is 120 cm and 428 cm respectively. What is the difference between their radii?
A sector of a circle has a central angle of 120° and a radius of 10 cm. Find the area of the sector.
- The area of a rhombus is 1,600 cm², and the lengths of its diagonals are in the ratio 5:4. A circle is constructed with the smaller diagonal as the diamet...
In a circle, the length of a chord AB is 48 cm & radius is 25 cm. Find the distance between centre and chord.
Determine the diameter of the incircle of a triangle whose area is 60 cm² and the semi-perimeter is 20 cm.
A circular racing track has been developed in a field. If the difference between the outer circumference and the inner circumference of the racing track...
In a circle AB is diameter & C is a point on circumference such that AC = 13 cm & BC = 84 cm then find the area of circle ?
- Calculate the area of a sector of a circle having a radius of 21 cm, if the angle at the center made by the sector is 60°.
A sector of a circle has a central angle of 90°. If the radius of the circle is 10 cm, what is the area of the sector?
Sum of diameter and circumference of a circle is 232 cm, the find area of circle.
Relevant for Exams:
