The probability of obtaining at least two $$'SIX'$$ in throwing a fair dice $$4$$ times is

Ram and Ramesh appeared in an interview for two vacancies in the same department. The probability of Ram's selection is $$1/6$$ and that of Ramesh is $$1/8$$. What is the probability that only one of them will be selected?

Among the four normal distributions with probability density functions as shown below, which one has the lowest variance?

The number of accidents occurring in a plant in a month follows Poisson distribution with mean as $$5.2.$$ The probability of occurrence of less than $$2$$ accidents in the plant during a randomly selected month is _________.