c. Profits of companies. Profits (in lakhs) 0-10 10-20 20-30 30-50 50-80 80-90 90-100 Number of Companies 4 12 24 32 18 9 3
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- * 24 Estimate the number of persons earning between Rs. 30 and Rs. 40 from the following : Income (Rs.) Number of persons 15-20 73 20-30 30-45 97 110 45-55 180 55-70 140 75A bouncy ball is dropped from a height of 2 metres onto a concrete floor. After hitting the floor, the ball rebounds back up to 80% of it's previous height, and this pattern continues on repeatedly, until coming to rest. (a) Show that the total distance travelled by the ball until coming to rest can be expressed by 2+4(0.8) + 4(0.8)² + 4(0.8)* + -- (b) Find an expression for the total distance travelled by the ball, in terms of the number of bounces, n. (c) Find the total distance travelled by the ball21/10 =
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