In a Mixture of Hydrogen and Helium Gases,the Mole Fraction $\times$

In a mixture of hydrogen and helium gases,the mole fraction of helium is 0.75.If the partial pressure of hydrogen in the mixture is 75 torr,what is the total pressure of the mixture?

A) 1.0 $\times$ 10² torr
B) 3.0 $\times$ 10² torr
C) 1.9 $\times$ 10¹ torr
D) 7.5 $\times$ 10² torr
E) 7.6 $\times$ 10² torr