GATE 2026 Production & Industrial Q61

Question

The number of soldering defects that occur in a semiconductor device follows a discrete Poisson distribution with a probability mass function $p(x) = \frac{e^{-\lambda}\lambda^x}{x!}$.
The average number of soldering defects per semiconductor device is 3.
The probability that a randomly selected semiconductor device will have at least two soldering defects is ______ (rounded off to two decimal places).

Accepted Answer

0.78 to 0.82