1. Categories >> Government >> UPSC >> UPSC General Studies
  2. Suggest New Category

Bag ?A? contains 5 white and 2 black balls. Bag ?B? contains
2 white and 3 black balls. If any one bag is chosen and a
ball is taken out of it at random, what is the probability
that the ball is black?

(a) 31/70

(b) 1/2

(c) 5/12

(d) 3/5

Question Posted / sesha ratnam

Answers were Sorted based on User's Feedback



Bag ?A? contains 5 white and 2 black balls. Bag ?B? contains 2 white and 3 black balls. If any one ..

Answer / roopesh agrawal

(c) 5/12

Is This Answer Correct ?    5 Yes 0 No

Bag ?A? contains 5 white and 2 black balls. Bag ?B? contains 2 white and 3 black balls. If any one ..

Answer / sesha ratnam

( a ) 31/70

Is This Answer Correct ?    5 Yes 2 No

Bag ?A? contains 5 white and 2 black balls. Bag ?B? contains 2 white and 3 black balls. If any one ..

Answer / hanumesh

b

Is This Answer Correct ?    0 Yes 0 No

Bag ?A? contains 5 white and 2 black balls. Bag ?B? contains 2 white and 3 black balls. If any one ..

Answer / md saber

a) 31/70 correct ans bcx chances of chosing of the bags is 1/2 so the ans goes= 1/2*2/7+1/2*3/7=31/70.
so first chosing of the bag then prob. of the black balls in the chosen bag.

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More UPSC General Studies Interview Questions

can anyone tell me which is the best coaching institute for IAS coaching in chennai for general studies and optionals public administration and zoology...preferably if any good coaching institute is in/ near T.nagar please mention it

9 Answers   TCS,

The most important limitation that generally served as a check on the absolution of the sultans of delhi was the power of the ---?

3 Answers  

Two dice are thrown simultaneously. The probability that the product of the two numbers on the two dice is an even number is (a) 1/2 (b) 3/4 (c) 5/16 (d) 3/8

7 Answers  

How many number of buckets you can fill the Himalaya level of water?

12 Answers   AD Solutions, Baidu, RRB, UPSC,

Shri Kiran Karnik is the (a) President of NASSCOM (b) Chairman of the Board of Control for Cricket in India (c) Chairman of Maharashtra State Public Service Commission (d) Managing Director of Engineers India Ltd.

2 Answers  




Chauri Chaura is known in the history of India?s struggle for freedom because (a) Gandhiji launched his first Satyagraha in India from this place (b) Gandhiji withdrew his Satyagraha movement when an irate mob set fire to a police station and burnt some policemen (c) Hundreds of freedom fighters were shot dead at this place by the police (d) Gandhiji sat on a hunger strike

3 Answers  

which are of the following is a high risk cleaning area in a food production area

0 Answers  

Bag ?A? contains 5 white and 2 black balls. Bag ?B? contains 2 white and 3 black balls. If any one bag is chosen and a ball is taken out of it at random, what is the probability that the ball is black? (a) 31/70 (b) 1/2 (c) 5/12 (d) 3/5

4 Answers  

The ?Grand Trunk Road? connects (a) Kolkata and Mumbai (b) Delhi and Chennai (c) Kolkata and Amritsar (d) Tirupati and Ludhiana

12 Answers   UPPCL, UPSC,

Knesset is the name of the Parliament of (a) Norway (b) Sweden (c) Israel (d) Spain

1 Answers  

Grassroots of democracy is

9 Answers  

which one of the following national highways passess through Maharashtra, Chhattisgarh and Orissa?

2 Answers   UPSC,

For more UPSC General Studies Interview Questions Click Here
Categories