(Q1-16) Consider a mixture of 40 mol% O2, 40 mol% He, and 20 mol% N2 with velocity of 3 m/s, - 6 m/s (note the minus sign), and 5 m/s, respectively. Determine the mass average velocity of the mixture. 2.84 m/s 2.04 m/s 2.24 m/s 2.44 m/s None of the given answers