Quant Quiz

Directions (1-5): Study the following information carefully and answer the questions given below. 

In a box there are 4 blue, 4 red, 4 white and 4 black balls.

1.If 4 balls are picked up randomly, what is the probability that all are blue?

(1)1/1820

(2)1/1870

(3)1/4

(4)1/455

(5)None of these

2.If 4 balls are picked up randomly, what is the probability that all are of same colour?

(1)1/1820

(2)1/4

(3)1/1870

(4)1/455

(5)None of these

3.If 4 balls are picked up randomly, what is the probability that not even one is white?

(1)1819/1920  

(2)99/364  

(3)1960/1990  

(4)1/455 

(5)None of these

4.From a pack of 52 cards, 2 cards are drawn randomly. What is the probability that it has one King and one Jack?

(1)7/663  

(2)8/663  

(3)11/663 

(4)13/663  

(5)None of these

5.In an examination a minimum marks is to be scored in each of the 8 subjects for passing. In how many ways a student can fail?

(1)127

(2)63

(3)255

(4)256

(5)None of these

6.Kriti bought an article with 15% discount on the selling price. If the cost of the article after discount was Rs. 408 what is the original selling price of the article? 

(1)Rs.460

(2)Rs.490

(3)Rs.440

(4)Rs.500

(5)None of these

7.The ratio between the present ages of A and B is 5 : 6 respectively. After nine years the sum of their ages will be  51 years. Find the present age of B? 

(1)3 years

(2)33 years

(3)18 years

(4)15 years

(5)None of these

8.A, B and C begin to jog around a circular stadium. They complete their revolutions in 32 seconds, 48 seconds and 30 seconds respectively. After how many seconds will they be together at the starting point for the first time?

(1)480

(2)960

(3)1440

(4)240

(5)None of these

9.A train of 200 meters long is running at the speed of 72 km per hour. In what time it passes a bridge 160 meters long?

(1)30 sec

(2)36 sec

(3)20 sec

(4)18 sec

(5)None of these

10.The average weight of a group of 15 people increases by 1kg when a person weighing 50 kg is replaced by a new person. Find weight of the new person.

(1)55 Kg

(2)60 kg

(3)65 kg

(4)70 kg

(5)Cannot be determined

Answers :