Mathmetics

ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

Q331.

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

1)	45 km/hr	2)	50 km/hr
3)	54 km/hr	4)	55 km/hr
5)	None of these

Q332.

The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio ?

1)	8 : 9	2)	17 : 18
3)	21 : 22	4)	Can't be determined
5)	None of these

Q333.

Two trains of equal lengths take 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 120 metres, in what time (in seconds) will they cross each other travelling in opposite direction ?

1)	10	2)	12
3)	15	4)	20
5)	None of these

Q334.

The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

1)	200 m	2)	225 m
3)	245 m	4)	250 m
5)	None of these

Q335.

A goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the goods train ?

1)	230 m	2)	240 m
3)	260 m	4)	270 m
5)	None of these

Q336.

A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw ?

1)	32	2)	48
3)	56	4)	64
5)	None of these

Q337.

In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women ?

1)	266	2)	5040
3)	11760	4)	86400
5)	None of these

Q338.

Out of 15 students studying in a class, 7 are from Maharastra, 5 are from Karnataka and 3 are from Goa. Four students are to be selected at random. What are the chances that at least one is from Karnataka ?

1)	1/15	2)	11/13
3)	12/13	4)	3/5
5)	None of these

Q339.

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue ?

1)	10/21	2)	11/21
3)	2/7	4)	5/7
5)	None of these

Q340.

Two pipes A and B can fill a tank in 15 minutes and 40 minutes respectively. Both the pipes are opened together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank ?

1)	12 min 15 sec	2)	15 min 30 sec
3)	20 min 10 sec	4)	25 min 20 sec
5)	None of these