# Two moles of an ideal gas with CP/CV = 5/3 are mixed with 3 moles of another ideal gas with CP/CV = 4/3.

Two moles of an ideal gas with CP/CV = 5/3 are mixed with 3 moles of another ideal gas with CP/CV = 4/3. The value of CP/CV for the mixture is:

(1) 1.50

(2) 1.42

(3) 1.45

(4) 1.47