The two main components ofa stereo system are a radio and a speaker (ignore all other components). The lifetime of the radio is exponentially distributed with mean of 1000 hours and the lifetime of the speaker is exponentially distributed with mean of 500 hours, independent of theradio’s lifetime. What is the probability that system’s failure is due to the radio?

the probability that system’s failure is due to the radio =

Step-by-step explanation:

From the question given;

Let the mean lifetime of the radio   and the mean lifetime of the speaker

we can re-write both expressions as:

 and

Let consider to be the variables which are independent to the exponentially distributed mean of

∴

replace the values now; we have:

Thus, the probability that system’s failure is due to the radio =

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

step-by-step explanation:

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