(1). From four probationary officers and eight clerks. Six of them are selected at random. What is the probability that group include exactly one probationary officer?

• (a). 56/231
• (b). 8/33
• (c). 56/122
• (d). 55/44
• (e). None of these

(2). A box contains 4 black balls, 3 red balls and 5 green balls. Two balls are drawn from the box at the random. What is the probability that both balls are same color?

• (a). 19/66
• (b). 20/60
• (c). 21/60
• (d). 19/55
• (e). None of these

(3). A box contains 4 black balls, 3 red balls and 5 green balls. Three balls are drawn from the box at the random. What is the probability that all the balls are same color?

• (a). 3/44
• (b). 2/60
• (c). 1/44
• (d). 4/50
• (e). None of these

(4). A bag contains 3 red, 5 yellow and 4 green balls. Three balls are drawn randomly. What is the probability that the balls drawn contain balls of different colors?

• (a). 5/11
• (b). 8/11
• (c). 3/11
• (d). 6/11
• (e). None of these

(5). A box contains 5 green, 4 yellow and 3 white marbles. Three marbles are drawn at random. What is the probability that they are not of the same colour?

• (a). 41/24
• (b). 41/44
• (c). 41/33
• (d). 41/34
• (e). None of these

(6). A back contains 8 black and 8 white balls. The probability of drawing 2 balls of the same color?

• (a). 3/11
• (b). 19/13
• (c). 7/15
• (d). 8/14
• (e). None of these

(7). A box contains 3 red, 6 green, and 5 white balls. A ball is drawn at random from the box. What is the probability that the ball is either red or green?

• (a). 9/14
• (b). 3/11
• (c). 7/15
• (d). 8/11
• (e). None of these

(8). A bunch contains tickets numbered from 1 to 20. Two tickets are drawn; find the probability that both the numbers are prime?

• (a). 9/95
• (b). 14/95
• (c). 15/95
• (d). 10/85
• (e). None of these

• (a). 32/162
• (b). 25/676
• (c). 38/165
• (d). 25/650
• (e). None of these

• (a). 36/149
• (b). 49/169
• (c). 651/676
• (d). 35/145
• (e). None of these