Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

find no. of straight lines that can be drawn through any two points out of 10 points, of which 7 are collinear?

find no. of straight lines that can be drawn through any two points out of 10 points, of which 7 are collinear?

Grade:12

1 Answers

Yash Baheti IIT Roorkee
askIITians Faculty 97 Points
6 years ago
Hi,

The no of st. lines from 10 points is 10c2. As selecting 2 points of 10 point will give us a line.

But wait, 7 of them are colinear, means we can only draw single line from those 7 points, so subtract 7c2 but dont forget to add one , as these 7 points can make one line.

So the answer is 10c2 – 7c2 + 1

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free