X1 is normal with mean mu and variance sigma^2. X2 is normal with mean mu and variance 2sigma^2. Consider the estimator cX1 + (1-c)X2. For what value of c is the variance minimized?

good luck on your studies! : )

david edward.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.