Suppose that two electronic components in the guidance system for a missile operate independently and that each has a length of life governed by the exponential distribution with mean 7 (with measurements in hundreds of hours). (a) Find the probability density function for the average length of life of the two components.

answer: median

step-by-step explanation:

the median is the middle value when a data set is ordered from least to greatest

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

3+3+3+2*2*2+29*12 = 365

step-by-step explanation: