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 ? 3463 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: Among T, M, S, J and U each having different heights. J is shorter only than T.M is not as tall as U and U is shorter than S. Who among them is the shortest?
3463 06023b5d2083f2c6596bc6446
6023b5d2083f2c6596bc6446- 1Jfalse
- 2Mtrue
- 3Sfalse
- 4Ufalse
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Answer : 2. "M"
Q: A hiker walks 2 km South, then he turns West and walks for 4 km, then he turns North and walks for 5 km, then he turns to his right and walks for 4 km. Where is he now with respect to his starting position?
3463 05e7de31d964aff79eb58eef0
5e7de31d964aff79eb58eef0- 17 km Northfalse
- 23 km Northfalse
- 33 km Southtrue
- 47 km Southfalse
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Answer : 3. "3 km South"
Q: In the given figure, AB, AE, EF, FG and GB are semicircles. AB=56 cm and AE=EF=FG=GB. What is the area (in cm2) of the shaded region?
3461 05d91af854a4d054073fb0e5c
5d91af854a4d054073fb0e5c- 1414.46false
- 2382.82false
- 3406.48false
- 4394.24true
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Answer : 4. "394.24"
Q: 34 is related to 12 in the same way as 59 is related to 3461 05b5cc7d2e4d2b419777512c7
5b5cc7d2e4d2b419777512c7- 145true
- 238false
- 326false
- 414false
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Answer : 1. "45"
Explanation :
Answer: A) 45 Explanation: The second number is the product of the digits of the first.
Q: Raju started his journey by going 4 km towards the north direction, then 3 km towards the west and then 8 km south. How far is he from the initial point?
3461 160b5f9783065e2501934b5f8
60b5f9783065e2501934b5f8- 16 kmfalse
- 25 kmtrue
- 37 kmfalse
- 48 kmfalse
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Answer : 2. "5 km"
Q: A large tanker can be filled by two pipes A and B in 60 and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half ? 3458 05b5cc6dce4d2b4197774e9ab
5b5cc6dce4d2b4197774e9ab- 131 minfalse
- 229 minfalse
- 328 minfalse
- 430 mintrue
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Answer : 4. "30 min"
Explanation :
Answer: D) 30 min Explanation: Part filled by (A + B) in 1 minute = (1/60 + 1/40) = 1/24Suppose the tank is filled in x minutes.Then, x/2(1/24 + 1/40) = 1(x/2) * (1/15) = 1 => x = 30 min.
Q: 96% of the population of a village is 23040. The total population of the village is ? 3457 05b5cc6e7e4d2b4197774ed92
5b5cc6e7e4d2b4197774ed92- 124000true
- 232256false
- 325478false
- 426587false
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Answer : 1. "24000"
Explanation :
Answer: A) 24000 Explanation: Let the total population be 'P' P x (96/100) = 23040 P = 240 * 100 P = 24000.