There are complete `7` white, `5` black and also `4` red balls.So, over there are complete `16` balls.So, total number of ways illustration `2` balls are `C(16,2).`(i) Total number of ways both the ball attracted are white `= C(7,2)``:.` Probability of drawing both white balls `= (C(7,2))/(C(16,2)) = 21/120 = 7/40`.(ii) Total number of ways among the attracted ball is black and also other is red `= C(5,1)*C(4,1)``:.` Probability of drawing one black ball and also one red round `= (C(5,1)*C(4,1))/(C(16,2)) = 20/120 = 1/6.` (iii)Total number of ways both balls space of exact same colour `= C(7,2)+C(5,2)+C(4,2)``:.` Probability of illustration both balls of very same colour `= (C(7,2)+C(5,2)+C(4,2))/(C(16,2)) = (21+10+6)/(C(16,2)) = 37/120`
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