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**ilikec** suppose that a certain device consists of 10 components and each component's life time can be modeled using a exponential distribution with mean 100 hours.

a) assuming that the device becomes out of order when one component burns. Find the distribution functionn for the lifetimee of this device.

b) assume that the device will be put to work even if at least one component is working fund the distribution functionn for the lifetime for this device.

I've got no idea to proceed with this problem. Please help me.