Practice Question and Answer

Q:

Write the following in the correct order.
1. Yarn
2.Plant
3.Sari
4. Cotton
5. Clothing

2008 0

  • 1
    2, 4, 5, 1, 3
    Correct
    Wrong
  • 2
    2, 4, 1, 5, 3
    Correct
    Wrong
  • 3
    2, 4, 3, 5, 1
    Correct
    Wrong
  • 4
    2, 4, 5, 3, 1
    Correct
    Wrong
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Answer : 2. "2, 4, 1, 5, 3"

Q: A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively. What is the probability that the problem will be solved? 2008 0

  • 1
    1/4
    Correct
    Wrong
  • 2
    1/2
    Correct
    Wrong
  • 3
    3/4
    Correct
    Wrong
  • 4
    7/12
    Correct
    Wrong
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Answer : 3. "3/4"
Explanation :

Answer: C) 3/4 Explanation: Let A, B, C be the respective events of solving the problem and A , B, C be the respective events of not solving the problem. Then A, B, C are independent event ∴A, B, C are independent events Now,  P(A) = 1/2 , P(B) = 1/3 and P(C)=1/4  PA=12, PB=23, PC= 34 ∴ P( none  solves the problem) = P(not A) and (not B) and (not C)                     = PA∩B∩C                    = PAPBPC         ∵ A, B, C are Independent                                          =  12×23×34                     = 14   Hence, P(the problem will be solved) = 1 - P(none solves the problem)                  = 1-14= 3/4

Q:

A bar graph showing the height of six mountain peaks. Study the bar graph and answer the following Questions.

The average height of all the peak (in meters) is

2008 0

  • 1
    7600
    Correct
    Wrong
  • 2
    7601.5
    Correct
    Wrong
  • 3
    7599.5
    Correct
    Wrong
  • 4
    7610
    Correct
    Wrong
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Answer : 1. "7600"

Q: From a group of 7 boys and 6 girls, five persons are to be selected to form a team, so that at least 3 girls are there in the team. In how many ways can it be done? 2008 0

  • 1
    427
    Correct
    Wrong
  • 2
    531
    Correct
    Wrong
  • 3
    651
    Correct
    Wrong
  • 4
    714
    Correct
    Wrong
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Answer : 2. "531"
Explanation :

Answer: B) 531 Explanation: Given in the question that, there are 7 boys and 6 girls.  Team members = 5 Now, required number of ways in which a team of 5 having atleast 3 girls in the team =  6C3  x 7C2  + 6C4 x 7C1 + 6C5= 6x5x43x2x1 x 7x62x1 + 6x5x4x34x3x2x1 x 7 + 6x5x4x3x25x4x3x2x1= 420 + 105 + 6= 531.

Q:

"Agriculture Shot" is related to which one of the following sports?

2008 0

  • 1
    Cricket
    Correct
    Wrong
  • 2
    Baseball
    Correct
    Wrong
  • 3
    Squash
    Correct
    Wrong
  • 4
    Badminton
    Correct
    Wrong
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Answer : 1. "Cricket"
Explanation :

Agricultural shot is related to cricket.

Q:

A shopkeeper marked the price of an article by 40% above cost price and gave discount of Rs. 224. On the final amount, he charged 10% tax. In the whole transaction, he earned Rs. 158.6. Find cost price of the article.

2008 0

  • 1
    Rs 750
    Correct
    Wrong
  • 2
    Rs 760
    Correct
    Wrong
  • 3
    Rs 744
    Correct
    Wrong
  • 4
    Rs 757
    Correct
    Wrong
  • 5
    Rs 748
    Correct
    Wrong
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Answer : 1. "Rs 750"

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Answer : 2. "Rs. 50"

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