Question

A room has three lightbulbs. Each one has a 30% probability of burning out within the month. Write the probability as a percentage rounded to one decimal place

What is the probability that at the end of the month at least one of the bulbs will be lit?

Answer 1

8 let A,B & C denote the event that first, second 4 third bulb will busn Out respectively Ceiven P(A)= P(B), PLC): 30% - 0.30 Also A, B and care independenti Platleast one of the bulbs will be lit) = 1-PCNo bulb will be lite)= 1-Plall 3 burnt out) - -PlanBnc): 3-P(A). PCB). PCC) = -00.37(0.3) (0,3): 0.973 - 197.31%