GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 20 Oct 2019, 21:01

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

The number of circles that can be drawn out of 10 points of

Author Message
Senior Manager
Joined: 12 Jan 2019
Posts: 263
The number of circles that can be drawn out of 10 points of  [#permalink]

Show Tags

12 Jan 2019, 21:21
1
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (01:24) wrong based on 1 sessions

HideShow timer Statistics

The number of circles that can be drawn out of 10 points of which 7 are collinear is
(a) 130
(b) 85
(c) 45
(d) 105
(e) Cannot be determined

Kudos for Kudos

[b]Posted from my mobile device

_________________
In case my post helps you, please provide me with kudos. Thank you
Senior Manager
Joined: 12 Jan 2019
Posts: 263
The number of circles that can be drawn out of 10 points of  [#permalink]

Show Tags

12 Jan 2019, 21:23
For drawing a circle we need 3 non collinear points. This can be done in:
3C3+3C2×7C1+3C1×7C2 = 1+21+63 = 85

_________________
In case my post helps you, please provide me with kudos. Thank you
The number of circles that can be drawn out of 10 points of   [#permalink] 12 Jan 2019, 21:23
Display posts from previous: Sort by