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नवीनतमलोकप्रियमूल्यांकनपेज देखें 190 of 261कुल सवाल 2086 जॉइन Examsbook

प्र: In a box, there are 9 blue, 6 white and some black stones. A stone is randomly selected and the probability that the stone is black is ¼. Find the total number of stones in the box? 1563 0

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    15
    सही
    गलत
  • 2
    18
    सही
    गलत
  • 3
    20
    सही
    गलत
  • 4
    24
    सही
    गलत
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उत्तर : 3. "20"
व्याख्या :

Answer: C) 20 Explanation: We know that, Total probability = 1 Given probability of black stones = 1/4 => Probability of blue and white stones = 1 - 1/4 = 3/4 But, given blue + white stones =  9 + 6 = 15 Hence, 3/4 ----- 15  1   -----  ? => 15 x 4/3 = 20.   Hence, total number of stones in the box = 20.

प्र: In how many different ways can the letters of the word 'THERAPY' be arranged so that the vowels never come together? 1562 0

  • 1
    1440
    सही
    गलत
  • 2
    720
    सही
    गलत
  • 3
    2250
    सही
    गलत
  • 4
    3600
    सही
    गलत
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उत्तर : 4. "3600"
व्याख्या :

Answer: D) 3600 Explanation: Given word is THERAPY. Number of letters in the given word = 7 These 7 letters can be arranged in 7! ways. Number of vowels in the given word = 2 (E, A) The number of ways of arrangement in which vowels come together is 6! x 2! ways   Hence, the required number of ways can the letters of the word 'THERAPY' be arranged so that the vowels never come together = 7! - (6! x 2!) ways = 5040 - 1440 = 3600 ways.

प्र: Second & fourth Saturdays and every Sunday is a holiday. How many working days will be there in a month of 31 days beginning on a Friday ? 1562 0

  • 1
    24
    सही
    गलत
  • 2
    23
    सही
    गलत
  • 3
    22
    सही
    गलत
  • 4
    25
    सही
    गलत
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उत्तर : 1. "24"
व्याख्या :

Answer: A) 24 Explanation: Given that the month begins on a Friday and has 31 days   Sundays = 3rd, 10th, 17th, 24th, 31st=> Total Sundays = 5   Every second & fourth Saturday is holiday. 2nd & 4th Saturday in every month = 2   Total days in the month = 31   Total working days = 31 - (5 + 2) = 24 days.

प्र: A number, when 35 is subtracted from it, reduces to its 80 percent. What is four - fifth of that number  ? 1562 0

  • 1
    175
    सही
    गलत
  • 2
    140
    सही
    गलत
  • 3
    135
    सही
    गलत
  • 4
    95
    सही
    गलत
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उत्तर : 2. "140"
व्याख्या :

Answer: B) 140 Explanation: x - 35 = 80x/100  => x = 175  => 4x/5 = 4x175/5 = 140.

प्र: Statement: It is estimated that about twenty lakh people will visit the city during the ensuing festival.Courses of action:a. The civic authority should monitor the crowd and restrict entry of the people beyond a manageable number.b. The local police authority should be put on high alert to maintain law and order during the festival.c. All the hospitals in the city should be put on high alert in case of any eventuality. 1562 0

  • 1
    Only a follows
    सही
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  • 2
    Both b & c follows
    सही
    गलत
  • 3
    Only c follows
    सही
    गलत
  • 4
    Both a and b sufficient
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    गलत
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उत्तर : 2. "Both b & c follows"
व्याख्या :

Answer: B) Both b & c follows Explanation: Clearly, People cannot be deprived of enjoying the festival for lack of arrangements. Also, it becomes necessary to deploy police to regulate big crowds and avert any mishap in public gatherings. Further, it costs nothing but might prove useful to put hospitals on alert to be ready to provide quick medical aid to patients in case of any eventuality. So, both b and c follow.

प्र: Kudos means 1562 0

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    blame
    सही
    गलत
  • 2
    shame
    सही
    गलत
  • 3
    fame
    सही
    गलत
  • 4
    angry
    सही
    गलत
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उत्तर : 3. "fame"
व्याख्या :

Answer: C) fame Explanation: Kudos means Praise or Congrats or Compliments. Fame is Synonym of Kudos. Blame, Shame and Angry are Antonyms of Kudos.

प्र: At an examination in which maximum marks are 500. K got 10% less than L, L got 25% more than M and M got 20% less than N. If K got 360 marks what percentage of marks was obtained by N ? 1561 0

  • 1
    80
    सही
    गलत
  • 2
    87
    सही
    गलत
  • 3
    78
    सही
    गलत
  • 4
    76
    सही
    गलत
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उत्तर : 1. "80"
व्याख्या :

Answer: A) 80 Explanation: Let marks obtained by N = x M's marks = 0.80x L's marks = 1.25 (0.80x) K's marks = (0.90) (1.25) (0.80x) = 0.9x But 0.9x = 360 ⇒ x = 400 Percentage of Marks obtained by N = 400 x 100/500 = 80%

प्र: Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ? 1561 0

  • 1
    2/3
    सही
    गलत
  • 2
    1/2
    सही
    गलत
  • 3
    7/8
    सही
    गलत
  • 4
    4/5
    सही
    गलत
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उत्तर : 2. "1/2"
व्याख्या :

Answer: B) 1/2 Explanation: Multiples of 3 below 20 are 3, 6, 9, 12, 15, 18 Multiples of 5 below 20 are 5, 10, 15, 20 Required number of possibilities = 10Total number of possibilities = 20Required probability = 10/20 = 1/2.

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