Suppose that 𝑋 is equal to either 1 or 2, with equal probability. Write down an expression for the probability that there were exactly 2 arrivals during the time interval [0,2].
(Enter e for the constant 𝑒. You may use standard notation for this numerical entry even though there will be no parser below the answer box. Enter an exact answer or a numerical answer accurate to at least 3 decimal places.)
Probability that there were exactly 2 arrivals during the time interval [0,2]:
1 answer
e^(-2)