A) 1.40
B) 1.50
C) 1.53
D) 3.07
Correct Answer: D
Solution :
\[{{\gamma }_{mix}}=\frac{\frac{\mu {{ & }_{1}}{{\gamma }_{1}}}{{{\gamma }_{1}}-1}+\frac{{{\mu }_{2}}{{\gamma }_{2}}}{{{\gamma }_{2}}-1}}{\frac{{{\mu }_{1}}}{{{\gamma }_{1}}-1}+\frac{{{\mu }_{2}}}{{{\gamma }_{2}}-1}}\] \[\frac{\frac{1\times \frac{5}{3}}{\left( \frac{5}{3}-1 \right)}+\frac{1\times \frac{7}{3}}{\left( \frac{7}{3}-1 \right)}}{\frac{1}{\left( \frac{5}{3}-1 \right)}+\frac{1}{\left( \frac{7}{5}-1 \right)}}\approx 1.06\] Hence, no option is matching.
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