CAT Practice Question and Answer

Q: Let K and L be events on the same sample space, with P (K) = 0.8 and P (B) = 0.6. Are these two events are disjoint ? 2017 0

  • 1
    B) = 0.6. Are these two events are disjoint ? A)
    Correct
    Wrong
  • 2
    = 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "= 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P("
Explanation :

Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(A) + P(B) - P(AꓵB). An event is disjoint if P(A ꓵ B) = 0. If K and L are disjoint P(K ꓴ L) = 0.8 + 0.6 = 1.4 And Since probability cannot be greater than 1, these two mentioned events cannot be disjoint.

Q: Which state government has observed “Parents’ Worship Day” on February 14 ? 2017 0

  • 1
    Odisha
    Correct
    Wrong
  • 2
    Madhya Pradesh
    Correct
    Wrong
  • 3
    Assam
    Correct
    Wrong
  • 4
    Chhattisgarh
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "Chhattisgarh"
Explanation :

Answer: D) Chhattisgarh Explanation: The 'Parents’ Worship Day' (or 'Matru-Pitru Diwas' ) is celebrated every year by the Chhattisgarh government on February 14 at all schools in the state to teach 'Bharatiya sanskriti' to students.

Q: In a joint family, there are 24 members whose age is decreased by 4 months, when one girl aged 24 years is replaced by a new boy. Find the age of the new boy ? 2016 0

  • 1
    18 years
    Correct
    Wrong
  • 2
    12 years
    Correct
    Wrong
  • 3
    15 years
    Correct
    Wrong
  • 4
    16 years
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "16 years"
Explanation :

Answer: D) 16 years Explanation: Age of new boy = (Age of moved girl) – (Number of family members × Decreased in average) = 24 – 24×4/12 = 24 – 8 = 16 years.

Q: A is three times as old as B. C was twice-as old as A four years ago. In four years' time, A will be 31. What are the present ages of B and C ? 2015 0

  • 1
    45, 10
    Correct
    Wrong
  • 2
    10, 50
    Correct
    Wrong
  • 3
    9, 50
    Correct
    Wrong
  • 4
    50, 15
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "9, 50"
Explanation :

Answer: C) 9, 50 Explanation: Let the age of A = A, B = B and C = C From given A = 3B 4 years ago, C-4 = 2(A-4); After 4 years A + 4 = 31; A = 27;sub in above B, we get B = 9 C = 2(27 - 4) + 4 = 46 + 4 = 50 Hence B = 9yrs and C = 50yrs.

Q: What can you serve but never eat? 2015 0

  • Show AnswerHide Answer
  • Workspace

Answer :
Explanation :

A Badminton shuttle or a tennis ball.

Q: India has been placed in the _______ spot in the renewable energy country attractiveness index by EY. 2015 0

  • 1
    1st
    Correct
    Wrong
  • 2
    2nd
    Correct
    Wrong
  • 3
    3rd
    Correct
    Wrong
  • 4
    4th
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "2nd"
Explanation :

Answer: B) 2nd Explanation: India has been placed in the second spot in the renewable energy country attractiveness index by EY. The UK accountancy firm noted the fast pace of growth in Indian renewable energy in the past three years. Over 10 gigawatt (Gw) of solar power was added between 2015 and 2017 and wind energy capacity grew to 5.4 Gw in 2017-18. This growth is in the context of the government’s ambitious targets — 175 Gw of renewables by 2022, with 40 per cent installed capacity from renewables by 2030 — and the dramatic price falls in photovoltaic technology.

Q: Tetraethyl lead is used as 2015 0

  • 1
    Fire extinguisher
    Correct
    Wrong
  • 2
    Gasoline additive
    Correct
    Wrong
  • 3
    Mosquito repellent
    Correct
    Wrong
  • 4
    Pain killer
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "Gasoline additive"
Explanation :

Answer: B) Gasoline additive Explanation: Tetraethyl lead is a highly toxic compound used as a gasoline additive. Tetraethyl lead abbreviated as TEL, is an organo lead compound with the formula (CH3CH2)4Pb. It is a petro-fuel additive which in turn caused increased vehicle performance. This is also used as an antiknock agent in gasoline and jet fuels. Tetraethyl lead is absorbed rapidly by the skin, the lungs, and the gastrointestinal tract. It is converted to triethyl lead, which might be responsible for its toxicity.

Q: What is the next letter in the given seriesM N J Q G ? 2015 0

  • 1
    U
    Correct
    Wrong
  • 2
    S
    Correct
    Wrong
  • 3
    T
    Correct
    Wrong
  • 4
    H
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "T"
Explanation :

Answer: C) T Explanation: 1ST SERIES = M J G... It decreasing by 3 alphabets.2ND SERIES = N Q... It increasing by 3 alphabets. M N J Q G T...

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully