A man can hit a target once in 4 shots. If he fires 4 shots in succession, what is the probability that he will hit his target

1.  1

2.  1/256

3.  81/256

4.  175/256

View Answer  
4
Correct Answer :

175/256


Explanation :
No Explanation available for this question

The letters B,G,I,N and R are rearranged to form the word 'Bring'. Find its probability:

1.  1/120

2.  1/54

3.  1/24

4.  1/76

View Answer  
4
Correct Answer :

1/120


Explanation :
No Explanation available for this question

An anti- aircraft gun can take a maximum of four shots at an enemy plane moving away from it. The probability of hitting the plane at the first, second, third and fourth shots are 0.4, 0.3, 0.2 and 0.1 respectively. What is the probability that the plane is hit when all the four shots are fired

1.  0.6872

2.  0.4379

3.  0.6976

4.  None of these

View Answer  
4
Correct Answer :

0.6976


Explanation :
No Explanation available for this question

The incomes of two people are in the ratio 4: 5 and expenditures in the ratio 7: 8 respectively. The total savings between the two of them is Rs.3000 and that is split in the ratio 1: 2. Find their total income.

1.  Rs.15,000

2.  Rs.18,000

3.  Rs.22,500

4.  Rs.27,000

View Answer  
4
Correct Answer :

Rs.18,000


Explanation :
No Explanation available for this question

The cost of production in a factory has a fixed component and an amount that varies directly with the number of units produced.   The units are sold at 20% profit.  When 250 units are produced, the price is Rs.120, and the price drops to Rs.96 when the production is doubled.  What will the price be when 1000 units are produced

1.  Rs.70

2.  Rs.80

3.  Rs.86.8

4.  Rs.84

View Answer  
4
Correct Answer :

Rs.84


Explanation :
No Explanation available for this question

The perimeter of a right angled triangle is 60 cm and the area of the rectangle contained by the two sides that include the right angle is 300 cm2.  What are the 3 sides  

1.  10, 24, 26

2.  15, 20, 25

3.  10, 20, 30

4.  18, 20, 22

View Answer  
4
Correct Answer :

15, 20, 25


Explanation :
No Explanation available for this question

What is  the  largest number  of  pipes of the  shape  of  right circular cylinders  with  length10 cm and radius 1 cm that can be fitted into a box, all of whose sides are 20 cm in length

1.  800

2.  400

3.  200

4.  None of these

View Answer  
4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

A  certain  amount  of  money has  been  invested  to  earn  a  simple  interest  of  10%  per  annum.  The interest earned every year is again invested at the same rate.  After how many years will the amount become the square of itself  

1.  7

2.  14

3.  22

4.  Indeterminate

View Answer  
4
Correct Answer :

Indeterminate


Explanation :
No Explanation available for this question

There is a square park with sides 20 m, and there are 2 diagonal paths that are√2 m wide.Find the area of the park without the paths.  

1.  324 m2  

2.  320 m2

3.  322 m2

4.  326 m2

View Answer  
4
Correct Answer :

324 m2

 


Explanation :
No Explanation available for this question

What is the minimum length of a string with which one can surround a triangle of area 36√3 cm

1.  8 cm  

2.  36 cm

3.  72 cm

4.  56 cm

View Answer  
4
Correct Answer :

36 cm


Explanation :
No Explanation available for this question
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