Directions : These questions are based on the following table : **Weight distribution in the average adult** | Organs | Weight (in grams) | |---|---| | Muscles | 30000 | | Skeleton | 10000 | | Blood | 5000 | | Gastrointestinal tract | 2000 | | Lungs | 1000 | | Liver | 1700 | | Brain | 1500 | The ratio expressed in decimals of the weight of the blood to the weight of the gastrointestinal tract is

### Concept & Decimal Ratios A ratio compares two quantities by division. To express a ratio as a decimal, simply calculate the fraction formed by the two values in the exact order requested by the prompt. $$ \text{Ratio} = \frac{\text{Weight of Blood}}{\text{Weight of Gastrointestinal tract}} $$ ### Step-by-Step Solution * Identify the weight of the blood from the table: $5000$ grams. * Identify the weight of the gastrointestinal tract from the table: $2000$ grams. * Formulate the ratio as a fraction, keeping blood in the numerator: $$ \frac{5000}{2000} $$ * Simplify the fraction by crossing out the common trailing zeros (dividing by $1000$): $$ \frac{5}{2} $$ * Convert the simplified fraction into a decimal: $$ 5 \div 2 = 2.5 $$ ### Exam Strategy & Shortcut Skip writing down the full numbers. Note the significant digits: Blood is $5$ (thousand) and Gastrointestinal tract is $2$ (thousand). Mentally compute $5 \div 2 = 2.5$. ### Common Pitfall Inverting the ratio and calculating Gastrointestinal tract to Blood ($2000 \div 5000 = 0.4$). Always strictly follow the "A to B" order given in the text, which means A is the numerator and B is the denominator. ### Final Answer Therefore, the correct answer is **$2.5$**.