Science:Math Exam Resources/Courses/MATH103/April 2011/Question 05 (b)
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Question 05 (b) 

In a room two different lightbulbs and are installed. According to the packaging, lightbulb fails before time with probability ( in months). Lightbulb has a probability density function for the failure time given by Determine the constant of the probability density function for the failure time of lightbulb ? 
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Hint 

Since is a probability density function, what does need to be? 
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Solution 

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Please rate my easiness! It's quick and helps everyone guide their studies. Since is a probability density function, Hence,
Therefore, 