ONGC Government Jobs Exams Numerical Ability Permutation and Combination

Out of 8 crew members 3 particular members can sit only on the left side.Another 2 particular members can sit on the right side.Find the number of ways in which the crew can be arranged so that four men can sit on each side

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ONGC Other Question

IN what proportion must rice that cost Rs.20/kg be mixed with rice that costs RS.25/kg so that the mixture is worth Rs.22/kg?
a.1:3
b.3:1
c.2:3
d.3:2