Q. 174.0( 4 Votes )

The following tab

Answer :

Concept Used:



Explanation:


Given:


(i) The probability that the life time of the selected bulb is less than 400


(ii) The probability that the lifetime of the selected bulb is between 300 – 800 hours


(iii) The probability that the lifetime of the selected bulb is at least 700 hours


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