Math, asked by yashaskapur7984, 5 months ago

How many lines can be drawn by joining 20 points?
20
22
119
190

Answers

Answered by MishraVidya1205
2

Answer:

2 points are required for a line , so from 20 points total no. of lines are 20C2.

but 4 points are linear so lines formed from these 4 points would be identical.

so substract 4C2 from total.

hence answer is 20C2 - 4C2 +1 .

20*19/2 - 4*3/2 +1

190 - 6 +1

185

Step-by-step explanation:

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Answered by xxALONEKINGxx
0

2 points are required for a line , so from 20 points total no. of lines are 20C2.

but 4 points are linear so lines formed from these 4 points would be identical.

so substract 4C2 from total.

hence answer is 20C2 - 4C2 +1 .

20*19/2 - 4*3/2 +1

190 - 6 +1

185

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