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Three math classes : X, Y and Z take an algebra test
1. The average score of class X is 83
2. The average score of class Y is 76.
3. The average score of class Z is 85.
4. Average score of class X and Y is 79.
5. Average score of class Y and Z is 81.
What is the average score of classes X, Y, Z?
A circular running path is 726 metres in circumference. Two men start from the same point and walk in opposite directions at the speed of 3.75 km. per hour and 4.5 km per hour respectively. Then when will they meet for first chance:
Area of a square field is 1 hectare. The length of another square field is 1% more than the length of this square field. The difference in their areas is
AB and CD are two straight lines. Transversal EF intersects them as shown in the given figure. If b = c then
Two villages are 2 km apart.If the angles of depression of these villages when observed from a plane are found to be 45°and 60° respectively,then the height of the plane is
If x% of y is equal to z, what percent of z is x?
A boy,after giving away 80% of his pocket money to one companion and 6% of the remainder to another, has 47 paise left with him. How much pocket money did the boy have in the begining ?