Latest TCS Aptitude Question SOLUTION: A bo x co ntains 2 white balls 3 blac k balls and 4 red balls. I n how many ways can 3 balls be drawn fro m the box , if at least one blac k ball is to be included in the draw ?

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Previous Question: A well with 14 m inside diamet er is dug 10 m deep. Earth tak en out of it has been evenly spread all around it to a w idth of 21 m to fo rm an embank ment. The height of the embank ment is: (a) 1/2 m (b) 2/3 m (c) 3/4 m (d) 3/5 m Next Question: A 120 wire cable has been laid firmly undergr ound between two t elepho ne exchanges located 10k m apart. Unfortunately after the c able was laid it was discovered to be the wro ng type, the problem is the individual wir es are not labelled. There is no visual way of knowing whic h wire is whic h and thus co nnections at eit her end is not immediat ely possible. You are a trainee technician and your boss has asked yo u to identify and label the wires at both ends witho ut ripping it all up. You have no transpo rt and only a batt ery and light bulb to test co ntinuity. You do have tape and pen for labelling the wires. What is t he shortest dist anc e in k ilo met res you will need to walk to co rr ectly identify and label each wir e? (a) 17 (b) 15 (c) 10 (d) 20

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A bo x co ntains 2 white balls 3 blac k balls and 4 red balls. I n how many ways can 3
balls be drawn fro m the box , if at least one blac k ball is to be included in the draw ?: Asked In TCS (11 years ago); Unsolved Read Solution (10); Is this Puzzle helpful? (1) (0) Submit Your Solution

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Previous Question: A well with 14 m inside diamet er is dug 10 m deep. Earth tak en out of it has been evenly spread all around it to a w idth of 21 m to fo rm an embank ment. The height of the embank ment is: (a) 1/2 m (b) 2/3 m (c) 3/4 m (d) 3/5 m Next Question: A 120 wire cable has been laid firmly undergr ound between two t elepho ne exchanges located 10k m apart. Unfortunately after the c able was laid it was discovered to be the wro ng type, the problem is the individual wir es are not labelled. There is no visual way of knowing whic h wire is whic h and thus co nnections at eit her end is not immediat ely possible. You are a trainee technician and your boss has asked yo u to identify and label the wires at both ends witho ut ripping it all up. You have no transpo rt and only a batt ery and light bulb to test co ntinuity. You do have tape and pen for labelling the wires. What is t he shortest dist anc e in k ilo met res you will need to walk to co rr ectly identify and label each wir e? (a) 17 (b) 15 (c) 10 (d) 20

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Time: 00:01:33

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