self Maths Puzzle Numerical Ability Ratio and Proportion

In what ratio should wheat at Rs. 4.5 per kg be mixed with another variety at Rs. 5.25 per kg so that the mixture is worth of Rs. 5 per kg?

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self Other Question

The average minimum temperature for Monday, Tuesday and Wednesday was 4 deg that for Tuesday, Wednesday and Thursday was 5.5 deg, if the temperature on Monday was 2.6 deg what was the temperature on Thursday? A bag contains 8 red, 7 green and 5 blue balls. What is the maximum number of balls to be drawn to ensure that at least one ball of each color is drawn?