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CBSE X 2007 - Probability (Find the number of Blue Balls) A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball from the bag is thrice that of a red ball, find the number of blue balls in the bag. CBSE - X 2007 | 3 marks |
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CBSE X 2007 - Geometry (Finding the Surface Area of a Toy) A toy is in the form of a cone mounted on a hemisphere of common base radius 7 cm. The total height of the toy is 31 cm. Find the total surface area of the toy. CBSE - X 2007 | 3 marks |
