List of top Geo Engineering and Geo Informatics Questions on Probability asked in AP PGECET

If \(X\) is a Poisson random variable with \(P(X=0)=0.8\), then the variance of \(X\) is equal to

During a space shot, the primary computer system is backed up by two secondary systems. They operate independently of one another and each is \(90\%\) reliable. The probability that all three systems will be operable at the time of launch is