a) 6P5 b) 1 c) 5 d) None of these Answer: d Explanation: Since, all ...
View QuestionA man positioned at the origin of the coordinate system. the man can take steps of unit measure in the direction North, East, West or South. Find the number of ways of he can reach the point (5,6), covering the shortest possible distance.
a) 252 b) 432 c) 462 d) 504 Answer: c Explanation: In order to reach ...
View QuestionOut of eight crew members three particular members can sit only on the left side. Another two particular members can sit only on the right side. Find the number of ways in which the crew can be arranged so that four men can sit on each side.
a) 864 b) 863 c) 865 d) 1728 Answer: d Explanation: Required number of ways, = ...
View QuestionIn a certain laboratory, chemicals are identified by a colour-coding system. There are 20 different chemicals. Each one is coded with either a single colour or a unique two-colour pair. If the order of colours in the pairs does not matter, what is the minimum number of different colours needed to code all 20 chemicals with either a single colour or a unique pair of colours?
a) 7 b) 6 c) 5 d) 8 Answer: b Explanation: Each one coded with ...
View QuestionIn how many ways can a leap year have 53 Sundays
a) 365 b) 7 c) 4 d) 2 Answer: d Explanation: In a leap year ...
View QuestionThere are 20 couples in a party. Every person greets every person except his or her spouse. People of the same sex shake hands and those of opposite sex greet each other with a Namaste (It means bringing one’s own palms together and raising them to the chest level). What is the total number of handshakes and Namaste’s in the party?
a) 760 b) 1140 c) 780 d) 720 Answer: b Explanation: There are 20 men and ...
View QuestionHow many natural numbers less than a lakh can be formed with the digits 0,6 and 9?
a) 242 b) 243 c) 728 d) 729 Answer: a Explanation: The ...
View QuestionA bucket is in the from of a frustum of a cone and holds 28.490 litres of water. The radii of the top and bottom are 28 cm and 21 cm respectively. Find the height of the bucket.
a) 15 cm b) 20 cm c) 25 cm d) 30 cm Answer: a Explanation: Volume of bucket : = ...
View QuestionIf the height of a right circular cone is increased by 200% and the radius of the base is reduced by 50%, then the volume of the cone :
a) remains unaltered b) decreases by 25% c) increases by 25% d) increases by 50% Answer: b Explanation: Let ...
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