In: Statistics and Probability
Dave went to 3 different grocery stores and bought the same amount of Salmon, Shrimp and Tilapia for each visit to each grocery store. The prices for each type of seafood in each grocery store is as follows:
(a) Food Lion: $2.5/kg of Salmon, $6/kg of Shrimp and $3/kg of Tilapia, all for $26.
(b) Whole Foods: $1/kg of Salmon, $3/kg of Shrimp and $2/kg of Tilapia, all for $13.
(c) Bi-Lo: $2/kg of Salmon, $4/kg of Shrimp and $3/kg of Tilapia, all for $19.
Find how many kilograms of Salmon, Shrimp and Tilapia Dave buys each week.