CSC Company Numerical Ability Alligation or Mixture

There are 3 mixtures when mixed in the ratio of 3:4:5 price was 240.When mixed with 6:4:9 price was 340.what's the price when mixed in 5:6:8 ration price is_________

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CSC Other Question

Price of a book increases 15% successively (2times) what is the new price of the book more compared to that of the old price:
a)32.25% b)23.34% c)36% d)39%
One person has 2 child.At least one of them was a girl.Then the Probability that 2 of the are girl is_____