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`        There are 10 points in a row.In how many ways can 4 points be selected out of 10 such that no two points are consecutive.??`
2 months ago

Arun
23520 Points
```							Suppose we have four green balls, two of which are placed in a box, and six blue balls. Line up the six blue balls in a row. This creates seven spaces, five between successive blue balls and two at the ends of the row. Choose one of these seven spaces for the box with two green balls. Choose two of the remaining six spaces for the other two green balls. Now number the balls from left to right. The numbers on the green balls represent the positions of the selected people. Notice that exactly two of the green balls are consecutive, namely the ones in the box. Hence, there are 7C1 * 6Cw = 105
```
2 months ago
Vikas TU
10070 Points
```							Dear student For more concepts and same examples , Please refer this lnk https://www.askiitians.com/maths/permutation-and-combination.htmlGood Luck
```
2 months ago
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### Course Features

• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions