Milk and water are mixed in a vessel A in the proportion 5 : 2, and in vessel B in the proportion 8 : 5. In what proportion should quantities be taken from the two vessels so as to form a mixture in which milk and water will be in the proportion of 9 : 4?
a) 2 : 7
b) 3 : 8
c) 7 : 2
d) 8 : 3
Sol:
