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(18) A cylindrical drum of water is of height 10cm and 14cm in diameter. Find the volume of the drum. (take π = ²²/7) (a) 154 cm³ (b) 220 cm³ (c) 385 cm³ (d) 1540 cm³
(19) The chance of David winning a 100m race is ³/5, what is the probability of him losing the same race? (a) ²/5 (b) 0 (c) ¹/5 (d) 1
(20) Calculate the volume of a cone whose radius is 7cm and its height is 21cm. (take π = 22/7). (a) 3234 cm³ (b) 1078 cm³ (c) 1617 cm³ (d) 809 cm³
(21) A box contains 20 oranges and 10 grapes. What is the probability of picking a grape from the box? (a) ⅓ (b) ²/5 (c) ½ (d) ⅔
(22) Calculate the mean of the following set of numbers: 3, 18, 12, 10, 16, and 13. (a) 12 (b) 13 (c) 14 (d) 16
(23) Find the mean of the following data: 15, 8, 10, 5, 7, 12, 20. (a) 11 (b) 12 (c) 15 (d)20
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Step-by-step explanation:
(18) 22/7 * 7*7*10 ( π r^2h)
= (d)1540 cm^3
(19) (a) 2/5 (5/5- 3/5)
(20) 22/7 *7*7(21/3) ( π r^2 h/3)
22*7*7
(b)1078 cm^3
(21) (a) 1/3
(22) (3+18+12+10+16+13)/6
72/6
= (a)12
(23) (15+8+10+5+7+12+20)/7
77/7 = (a)11
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