WebHow many chords can be drawn through 21 points on a circle? Solution. A chord is formed by joining two points on a circle. ∴ Required number of chords = 2n C 2 Ex 7.4 Class 11 Maths Question 4. In how many ways can a team of 3 boys and 3 girls be selected from 5 boys and 4 girls? Solution. WebFor drawing one chord on a circle, only 2 points are required. To know the number of …
NCERT Solutions for Class 11 Maths Chapter 7 Permutations and ...
WebHow many chords can be drawn through 21 points on a circle? Answer : Number of points=21 ⇒n=21 A chord connects circle at two points. ⇒r=2 ⇒Number of chords from 21 points= n Cr ⇒ n Cr= 21 C2 ⇒ 21 C2=210 chords. Ans: 210 chords can be drawn through 21 points on a circle. ← Previous Next → WebNov 28, 2024 · Answer: Since, there are 10 points on the circle and to draw a chord we need to connect any two points on the circle to make it a straight line, which implies that the number of chords = No of lines connecting any two points out of the 10 points. = 10C2 = 10*9/2 = 45 chords. Hope this helps you ! fish juice for fishing
How many chords can be drawn through 21 points on a circle
WebApr 4, 2024 · Number of chords that can be formed using the 21 points. = 210. Therefore, … WebA chord is obtained by joining any two points on a circle. Therefore, total number of chords drawn through 21 points is same as the number of ways of selecting 2 points out of 21 points. This can be done in 21 C 2 ways. Hence, total number of chords = 21C 2= 19!2!21! =21×10=210 Was this answer helpful? 0 0 Similar questions WebSolution. There are 21 points on the circumference of a circle. Since one and only one … fish juice leaked in fridge