Quantitative Aptitude Practice Question and Answer

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Answer : 2. "100%"

Q: A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior ? 5976 0

  • 1
    ²²C₁₀ + 1
    Correct
    Wrong
  • 2
    ²²C₉ + ¹⁰C₁
    Correct
    Wrong
  • 3
    ²²C₁₀
    Correct
    Wrong
  • 4
    ²²C₁₀ - 1
    Correct
    Wrong
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Answer : 4. "²²C₁₀ - 1"
Explanation :

Answer: D) ²²C₁₀ - 1 Explanation: The total number of ways of forming the group of ten representatives is ²²C₁₀. The total number of ways of forming the group that consists of no seniors is ¹⁰C₁₀ = 1 way The required number of ways = ²²C₁₀ - 1

Q: 21 वस्तुओं का क्रय मूल्य 15 वस्तुओं के विक्रय मूल्य के बराबर है। लाभ प्रतिशत होगा? 5942 0

  • 1
    25%
    Correct
    Wrong
  • 2
    30%
    Correct
    Wrong
  • 3
    33%
    Correct
    Wrong
  • 4
    40%
    Correct
    Wrong
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Answer : 4. "40%"

Q: Find the next number in the series 3, 4, 5, 5, 12, 13, 7, 24, 25, 8, 15, ... 5921 0

  • 1
    26
    Correct
    Wrong
  • 2
    16
    Correct
    Wrong
  • 3
    17
    Correct
    Wrong
  • 4
    18
    Correct
    Wrong
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Answer : 3. "17"
Explanation :

Answer: C) 17 Explanation: The pattern is 32+42=52,  52+122=132, 72+242=252  The next number = 82+152=172  i.e. 17

Q: Two trains are moving in the same direction at 72 kmph and 36 kmph. The faster train crosses a girl sitting at window seat in the slower train in 32 seconds. Find the length of the faster train ? 5908 0

  • 1
    170 m
    Correct
    Wrong
  • 2
    100 m
    Correct
    Wrong
  • 3
    270 m
    Correct
    Wrong
  • 4
    320 m
    Correct
    Wrong
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Answer : 4. "320 m"
Explanation :

Answer: D) 320 m Explanation: Relative speed = (72 - 36) x 5/18 = 2 x 5 = 10 mps.Distance covered in 32 sec = 32 x 10 = 320 m. The length of the faster train = 320 m.

Q: 7 9 19 18 31 29 Find the odd number in the given Number Series? 5889 0

  • 1
    31
    Correct
    Wrong
  • 2
    29
    Correct
    Wrong
  • 3
    18
    Correct
    Wrong
  • 4
    19
    Correct
    Wrong
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Answer : 2. "29"
Explanation :

Answer: B) 29 Explanation: Here the given number series follows a pattern of two alternate series. 1. 7 19 31 ...(Difference of 12) 2. 9 18 27 ...(Difference of 9) Here the odd number is 29 instead of 27 And the next number is 31 + 12 = 43 & 27 + 9 = 36

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Answer : 2. "25%"
Explanation :

Answer: B) 25% व्याख्या: जब पानी मुफ्त में उपलब्ध हो और सारा पानी दूध की कीमत पर बेचा जाता है, तो पानी 20 लीटर दूध की कीमत पर लाभ देता है। चूँकि, लाभ% = ProfitCostPricex100 इसलिए, लाभ प्रतिशत = 520x100 = 25%

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