Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Seven white balls and three black balls are randomly placed in a row. The probability that no two black balls are placed adjacently equals
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
The number of ways to arrange 7 white an 3 black balls in a row 
Numbers of blank places between 7 balls are 6. There is 1 place before first ball and 1 place after last ball. Hence total number of places are 8.
Hence 3 black balls are arranged on these 8 places so that no two black balls are together in number of ways
So required probability 
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