c
$V_{1}=125 ml \quad V_{2}=150 m 1$
$P_{1}=0.60 \quad \; P_{2}=0.80$
we know that,
$P_{1} v_{1}+P_{2} v_{2} =P\left(v_{1}+v_{2}\right)$
$0.60 \times 125+0.80 \times 150=P(125+150)$
$0.60 \times 0.125 +0.80 \times 0.150=P(0.125+0.150)$
$0.195 =P 00.275$
$P =0.709$