Probability problem ....
Hello again >_<
The partially completed table gives the probability distribution for the number of breakdowns per week for a machine, based on historical data.
Breakdown per week 0_______1______2______3______4 or more
Probability_________X______ 0.4____ 0.22 ___0.12___0.06
Determine the probability that the number of breakdowns in a given week is at most one.
:confused: thank you very much for your help
The sum of probabiltiies must be unity (1).
Originally Posted by procrastinator
X + 0.4 + 0.22 + 0.12 + 0.06 = 1 Solve for X
Often, these things can be rephrased to be more convenient.
Pr(at most one) = Pr(0) + Pr(1)