Other Company Numerical Ability

I buy coffee from 3 different shops at Rs.150,Rs.140,Rs.130 per kg and mix them in proportion 8:5:3.At what price per kg must I sell the mixture to make a profit of 25%?

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Other Other Question

remainder of (1!^1!+2!^2!+....+50!^50!)/5 a light flashes every 6 seconds, how many times will it flash in ? of an hour?