For the following questions answer them individually
Four vessels of equal size are filled with mixtures of milk and water. The strength of milk in the four vessels is 80%, 75%, 60% and 50% respectively. If all four mixtures are mixed, what is the ratio of water to milk in the resultant mixture?
In the given figure, the circle represents boys, triangle represents students, and rectangle represents teenagers. What does M represent?
Two students appeared for an examination. One of them got 9 marks more than the other. His marks was also equal to 56% of the sum of their marks. What are their marks?
Find the total surface area of a hollow hemispherical bowl of diameter 14 cm and negligible thickness.
What is the gain per cent, while selling 33 m of cloth, if there is a gain equal to the selling price of 11 m?