EAMCET Engineering 2002 Solved Paper

At 27∘C, a closed vessel contains a mixture of equal weights of helium
(mol. wt. = 4), methane (mol, wt. =16 ) and sulphur dioxide (mol. wt. = 64). The pressure exerted by the mixture is 210‌mm. If the partial pressures of helium, methane and sulphur dioxide are p1,p1 and p3 respectively, which one of the following is correct?