Discussion

Explanation:

Quantity of water in 12 litres of juice = (3/8) × 12 = 4.5 litres 

Quantity of fruit pulp in 12 litres = 12 − 4.5 = 7.5 litres

Let x litres of the first can and y litres of the second can be used.  

∴ Quantity of water used in mixture = (0.25x + 0.5y) and quantity of pulp used = (0.75x + 0.5y)
 
Comparing the expressions for quantity of water and pulp in the mixtures: 

0.25x + 0.5y = 4.5 ... (i) 

0.75x + 0.5y = 7.5 ... (ii)

On solving, x = 6 and y = 6 

Hence, option (a).  

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