Published by:
CGP EDU Academic Team
Published on: August 13, 2026
An anti-aircraft gun takes a maximum of four shots at an enemy plane moving away from it. Theprobability of hitting the plane at the first, second, third and fourth shot is 
and 
respectively. The probability that the gun hits the plane is 
. Find closest integer to 
.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
70
Let 
and 
(the gun hits the plane) 
(the plane is hit in once)
the plane is hit in none of the shots)
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