The arithmetic mean of a and b is given as (a + b)/2

Here x= (6.64+2.36):(4.5-1.5)

=> x = 9 / 3

=> x = 3

y=(19-6.4):(4.9+1.4)

=> y = 12.6 / 6.3

=> y = 2

The arithmetic mean of 3 and 2 is (3 + 2)/2 = 5/2

**Therefore the required arithmetic mean of x and y is 5/2.**

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