Practice Question and Answer
8Q: fifteen persons are sitting around a circular table facing the centre. What is the probability that three particular persons sit together ? 3241 05b5cc731e4d2b4197774f7dd
5b5cc731e4d2b4197774f7dd- 13/91true
- 22/73false
- 31/91false
- 43/73false
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Answer : 1. "3/91"
Explanation :
Answer: A) 3/91 Explanation: In a circle of n different persons, the total number of arrangements possible = (n - 1)!Total number of arrangements = n(S) = (15 – 1)! = 14 !Taking three persons as a unit, total persons = 13 (in 4 units)Therefore no. of ways for these 13 persons to around the circular table = (13 - 1)! = 12!In any given unit, 3 particular person can sit in 3!. Hence total number of ways that any three person can sit =n(E) = 12! X 3!Therefore P (E) = probability of three persons sitting together = n(E) / n(S) = 12! X 3 ! / 14!= 12!x3x2 / 14x13x12! = 6/14x13 = 3/91
Q: Find the odd word from the following:
3240 05d285aac01f3c46ba90a1d74
5d285aac01f3c46ba90a1d74- 1ADGJtrue
- 2NQTVfalse
- 3PSVXfalse
- 4CFIKfalse
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Answer : 1. "ADGJ"
Explanation :
Except Option (A) all other word’s different is 3,3,2.
Q:In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
A person’s last performance
3239 06017c0bd6d6bae40a6317f22
6017c0bd6d6bae40a6317f22- 1Memoirfalse
- 2Swan songtrue
- 3Prognosisfalse
- 4Elegyfalse
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Answer : 2. "Swan song"
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Answer : 2. "dangers inherent in the cyber-world."
Q: ba_ba_bbaaa_bbb_ _aa
3238 05f5f29122e2c8928233ea619
5f5f29122e2c8928233ea619- 1baaaabfalse
- 2bababafalse
- 3baababfalse
- 4babbaatrue
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Answer : 4. "babbaa "
Q: The area of trapezium is 21 square cm, the distance between the parallel sides is 3 cm and one of the parallel sides is 8.3 cm. What is the length of the other parallel side ?
3237 15e4667b365b2ec50e42a778f
5e4667b365b2ec50e42a778f- 112.7 cmfalse
- 27.7 cmfalse
- 310.7 cmfalse
- 45.7 cmtrue
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Answer : 4. "5.7 cm"
Q: In Indian Polity which one is Supreme? 3237 15d1f44989e6ce62e3f204809
5d1f44989e6ce62e3f204809- 1The Supreme Courtfalse
- 2The constitutiontrue
- 3The parliamentfalse
- 4Religionfalse
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Answer : 2. "The constitution"
Q: 'A' starts walking towards North, turns left, again turns left, turns right, again turns right. In which direction is ' A ' walking now?
3236 05ef1b1e381a47f2e7ae8c7de
5ef1b1e381a47f2e7ae8c7de- 1South - Eastfalse
- 2Northtrue
- 3Southfalse
- 4Westfalse
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