Mathmetics

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

Q1.

Directions: Study the following information carefully and answer the given questions. In a bag X there are some identical green balls and rest other are blue balls (blue balls greater than the green balls). (i) Probability of getting 1 green and 1 blue ball without replacement is 40/87. (ii) Probability of getting both green is A. (iii) If there is another bag (Y) in which some blue balls and rest others are green. (iv) If a number of blue balls taken out from Y is 4 more than the green balls taken out from bag Y and added to bag X. Then the probability of getting both green from bag X is 13/123. Find the number of blue balls taken out from bag Y.

1)	2	2)	4
3)	5	4)	6

Q2.

Directions: Study the following information carefully and answer the given questions. In a bag X there are some identical green balls and rest other are blue balls (blue balls greater than the green balls). (i) Probability of getting 1 green and 1 blue ball without replacement is 40/87. (ii) Probability of getting both green is A. (iii) If there is another bag (Y) in which some blue balls and rest others are green. (iv) If a number of blue balls taken out from Y is 4 more than the green balls taken out from bag Y and added to bag X. Then the probability of getting both green from bag X is 13/123. What should be total number of balls in bag X ?

1)	10	2)	20
3)	29	4)	30

Q3.

Directions : Study the following information carefully and answer the given questions. In a bag X there are some identical green balls and rest other are blue balls (blue balls greater than the green balls). (i) Probability of getting 1 green and 1 blue ball without replacement is 40/87. (ii) Probability of getting both green is A. (iii) If there is another bag (Y) in which some blue balls and rest others are green. (iv) If a number of blue balls taken out from Y is 4 more than the green balls taken out from bag Y and added to bag X. Then the probability of getting both green from bag X is 13/123. What should be the value of A ?

1)	2/29	2)	3/29
3)	4/29	4)	5/29

Q4.	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

Q5.	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

Q6.	In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green ?

1)	1/2	2)	1/3
3)	4/9	4)	8/21

Q7.	What is the probability of getting a sum 9 from two throws of a dice ?

1)	1/6	2)	1/9
3)	1/8	4)	1/12
5)	None of these

Q8.	In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize ?

1)	1/5	2)	2/5
3)	2/7	4)	3/5
5)	None of these

Q9.	Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?

1)	1/2	2)	1/3
3)	3/4	4)	4/5
5)	None of thesae

Q10.	In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

1)	1/24	2)	21/46
3)	1/48	4)	24/117
5)	None of these