The molarity of a solute in solution is defined to be the number of moles of solute per liter of solution (1 mole=6.02 ×
molecules). If X is the molarity of a solution of magnesium chloride 
, and Y is the molarity of a solution of ferric chloride 
, the molarity of chloride ion (Cl-) in a solution made of equal parts of the solutions of 
is given by M=X+1.5Y. Assume that X has mean 0.125 and standard deviation 0.05, and that Y has mean 0.350 and standard deviation 0.10.
a. Find 
.
b. Assuming X and Y to be independent, find 
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