Permutations & Combinations — practice questions, page 9
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QuestionThe 4 walls of a square room are painted using 3 available colours, each wall one colour. Walls…QuestionFive cards are dealt from a standard 52-card pack. How many hands contain exactly one pair (two…QuestionFour couples are re-paired for a dance so that every man dances with a woman who is NOT his own…QuestionHow many positive whole numbers less than 10,000 have digits adding up to 9?QuestionThe arrangements of the letters of INDIA are written in dictionary order. What is the position of…QuestionTen straight lines are drawn in a plane so that no two are parallel and no three pass through one…QuestionIn how many 6-digit numbers do odd and even digits alternate (odd, even, odd, … or even, odd,…QuestionA lucky draw picks 3 different tokens from tokens numbered 1 to 30 (order ignored). In how many…QuestionA drone flies along a 3-D lattice from corner (0, 0, 0) to corner (2, 2, 2), each move being one…QuestionThe letters of MISSISSIPPI are arranged so that the four S's are all separated from one another.…QuestionEight people sit at a round table. Anjali and Bhavesh must sit next to each other, but Charu must…
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