On Monday a person mailed 8 packages weighting an average of 99/8 pounds and on Tuesday 4 packages weighting an average of 61...

Answer: 
40/13
On Monday a person mailed 8 packages weighting an average of 99/8 pounds and on Tuesday 4 packages weighting an average of 61/4 pounds. What was the average weight on pounds of all the packages the person mailed on both days?