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16 m from the foot respectively. If the angles l Uh- isgomplementary, then find the height of the towerblack ball from the bag is12) A bag contains 15 white and some black balls. If the probability of drawing athrice that of drawing a white ball, find the number of black balls in the bag1 5cm and a semicircle of radius 45 cm |
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Answer» No. of white balls = 15Let, the no. of black balls be 'x'Then, total no. of balls = 15 + xNow, P(drawing a white ball) = 15/(15 + x)And, P(drawing a black ball) = x/(15 + x)But A/Q, x/(15 + x) = 3*15/(15 + x) => x = 3*15 => x = 45Therefore, there are 45 black balls in the bag |
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