Night Class: Quant Quiz

1. In an examination a student attempted all 60 questions. He gets 2 marks for every right answer and minus 1 marks for each wrong answer. Find how many wrong questions were he attempted if got total 72 marks ?

1) 48 

2) 58 

3) 16 

4) 20 

5) None of these

7. Average monthly salary of 8 technicians of a workshop was Rs. 1200 and average monthly salary of non-technician was Rs. 300. Find total number of employee of this workshop if average monthly salary of all the employee was Rs. 500 ?

1) 16 

2) 36 

3) 56 

4) 40 

5) None of these

8. A shopkeeper buys some quantity of lemon at the rate 3 in Rs. 2 and buys same quantity of lemon at the rate 2 in Rs. 3. He sold all of them at the rate 5 in Rs. 5. If during the transaction the shopkeeper losses Rs. 30. Find the quantity of the first types of lemon that he mixed ?

1) 360 

2) 280 

3) 180 

4) 240 

5) None of these

9. A shopkeeper gives two successive discount of 50% and 40% respectively. If second discount is Rs. 180. Find selling price of this article ?

1) 900 

2) 270 

3) 370 

4) 570 

5) None of these

10. A man travels 25% part of the Journey at the speed of 50 km/hr, next 60 % part of the journey at the speed of 40 km/hr. and rest part of the journey at the speed of 20 km/hr. Find average speed of the men during whole journey ?

1) 34 4/11 km/hr

2) 37 4/11 km/hr

3) 36 4/11 km/hr

4) 80 km/hr

5) None of these

Answers:

6. 3

Let he attempted ‘x’ correct and ‘y’ wrong question

2x - y = 72-------- (I) and x + y = 60 -------- (II)

Solving (I) and (II) x = 44, y = 16

7. 2

Let number of non technician = x

1200 × 8 + 300 × x = ( 8 + x) × 500

9600 + 300 x = 500 x + 4000

x = 28

Total employee = 8 + 28 = 36

8. 3

Let no. of Ist type lemon = No. of IInd type lemon = x

CP = 2x/3 + 3x/2 = 13x/6

SP = 2x * 5/5 = 2x

13x/6 - 2x = 30

13x - 12x = 180

x = 180

9. 2

Let cost of article after Ist discount is x

x * 40/100 = 180

x = 450

SP after IInd discount = 450 - 180 = 270

10. 3

Let total distance is 100KM

T1 = 25/50 = 1/2 hour

T2 = 60/40 = 3/2 hour

T3 = 15/20 = 3/4 hour

T = 1/2 + 3/2 + 3/4 = 11/4 hour

Avg speed = 100/(11/4) = 36 4/11 km/hr