Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The probability of a bomb hitting a bridge is 
and two direct hits are needed to destroy it. The least number of bombs required so that the probability of the bridge beeing destroyed is greater then 0.9, is
Text Solution
Verified by ExpertsThe correct answer is:
A
Let 
be the least number of bombs required and 
the number of bombs that hit the bridge. Then 
follows a binomial distribution with parameter 
and 
Now 
This gives 
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