Probability rules, conditional probability, mean, variance and standard deviation.
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Q1 · Probability and Statistics · MEDIUM
A meteor shower occurs such that on average 18 meteors are observed per hour. Assuming the meteors follow a Poisson distribution, what is the probability of observing exactly 2 meteors in a 10-minute interval?
Q2 · Probability and Statistics · EASY
In a binary star system, the probability that each star undergoes a supernova in the next million years is 0.1, independently. What is the probability that at least one star goes supernova?
Q3 · Probability and Statistics · EASY
Two dice are thrown simultaneously. The probability that the sum of the numbers appearing on them is a prime number is: