A radio tube inserted into a system has probability 0.2 oflasting 500 hours. 20 tubes are tested.
1. Find probability that exactly that 'k' of these tubes willlast more than 500 hours.
2. Find probability that number of tubes that last more than 500hours will fall between 12 and 17.
3. Sketch the CDF of the random variable that describes therandom phenomenon
Also: a die is rolled 120 times. Find probability that 35 ormore sixes will be rolled.
Show all steps, thank you.
