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`        A and b stand in a ring with 9 persons.if the arrangement of 11 persons is at random then the probability that there are exactly 4 persons between a and b is`
8 months ago

Arun
13145 Points
```							Dear student Fix the position of A, then B can be sit in 10 positions, so total possible outcome = 10Now, exactly 4 persons are sitting between them. This can be done in two ways as shown in figure, so favourable outcomes = 2So, probability = 2/10 = 1/5  RegardsArun (askIITians forum expert)
```
8 months ago
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## COUPON CODE: SELF10

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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