# Question: Find P X 4 if X has a Poisson distribution

Find P(X = 4) if X has a Poisson distribution such that 3P(X = 1) = P(X = 2).

## Answer to relevant Questions

Suppose that the probability of suffering a side effect from a certain flu vaccine is 0.005. If 1000 persons are inoculated, find the approximate probability that At most 1 person suffers. 4, 5, or 6 persons suffer The weekly demand X for propane gas (in thousands of gallons) has the pdf If the stockpile consists of two thousand gallons at the beginning of each week (and nothing extra is received during the week), what is the ...Let X equal the number of alpha particle emissions of carbon-14 that are counted by a Geiger counter each second. Assume that the distribution of X is Poisson with mean 16. Let W equal the time in seconds before the seventh ...A certain type of aluminum screen 2 feet in width has, on the average, three flaws in a l00-foot roll. (a) What is the probability that the first 40 feet in a roll contain no flaws? (b) What assumption did you make to solve ...Let the distribution of X be N(μ, σ2). Show that the points of inflection of the graph of the pdf of X occur at x = μ ± σ.Post your question