Mathematics

A bag contains 10 red balls while the other contains 8 white balls. A bag is selected randomly, and a ball is picked up from the bag.  The probability that the ball is a RED ball is:

• 10/18

• 1/2

• 8/18

• 3/4

Two trains A and B are approaching each other on the same track. Train A is running at a speed of 25m/s while Train B is running at a speed of 20m/s. At one point the trains are 90 meters away from each other, the time taken by the trains to crash is:

• 2 seconds

• 3 seconds

• 4 seconds

• 5 seconds

Travelling at 3/4th of the original Speed a train is 10 minutes late. Find the usual Time taken by the train to complete the journey.

• 30 min

• 40 min

• 50 min

• 60 min

A 150 meters long train is running at a speed of 40m/s. A boy is running parallelly towards the train at a speed of 10m/s. The time taken by the boy to cross the train is:

• 2 sec

• 3 sec

• 4 sec

• 5 sec

A girl is sitting in a train running at a speed of 30m/s. The girl throws a ball in the air when the train reaches a point A, after 2 seconds the ball drops back to the girl’s hand when the train reaches the point B. The distance between point A and B is:

• 40 meters

• 50 meters

• 60 meters

• 70 meters

If 5^th of a month is first Saturday, then the third Wednesday will be on:

• 20th

• 16th

• 18th

• 21st

Two trains A and B are approaching each other on the same track. Train A is running at a speed of 30m/s while Train B is running at a speed of 20m/s. A bird is sitting on the top of train A, when the two trains are 200 meters apart, the bird starts to fly towards train B, once it reaches train B it immediately turns over and starts to fly towards Train A. The bird continues to do this till both the train crashes. If the bird flies at a speed of 20 m/s, then the total distance covered by the bird before the train crash is:

• 60 meters

• 70 meters

• 80 meters

• 100 meters

You visit a pizza shop and ask for a 12-inch pizza, however the store manager informs you about the non-availability of 12-inch pizza. He offers you two 6-inch pizza at the price of 12-inch pizza. Which of the following statement is correct.

• You got a better deal

• You got a bad deal

• You got the same deal

• None of the above

In a row of persons, the position of Saket from the left side of the row is 27th and position of Saket from the right side of the row is 34th. Find the total number of students in the row.

• 60

• 61

• 62

• 59

A bag contains 3 red, 4 green and 5 blue marbles. 8 marbles are randomly picked up from the bag. The probability that at least one of the marbles is BLUE is:

• 5/12

• 5/8

• 1

• 1/2