Question
A bag contains 3 black and 9 white balls. One ball is
drawn at random. What is the probability that the ball drawn is white?Solution
Let number of balls = (3 + 9) = 12. Number of white balls = 9 P (drawing a white ball) = 9/12 = 3/4.
If the arithmetic mean is 26.8 and the median is 27.9, then the mode is
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The way total output changes due to change in all inputs in same proportion is known as law of;
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