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 English interview questions  English Interview Questions (463)
 General Aptitude interview questions  General Aptitude Interview Questions (1894)
 Puzzles interview questions  Puzzles Interview Questions (460)
Question
There are two boxes, one containing 10 red balls and the
other containing 10 green balls. You are allowed to move the
balls between the boxes so that when you choose a box at
random and a ball at random from the chosen box, the
probability of getting a red ball is maximized. This maximum
probability is??	 
a)37/38	 
b)14/19	 
c)3/4	 
d)½
 Question Submitted By :: General-Aptitude
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Take one red ball in 1st bag.
put the remaining nine red ball with 10 green ball in other bag

prob of red ball inn ist bag=1/2
prob of red in other bag=(1/2)*(9/19)

the req prob=p(A)+p(B)
=1/2+9/38
=28/38
=14/19
 
Is This Answer Correct ?    91 Yes 15 No
Sumit Kumar
 
Answer
# 2
pakhi: dn't demorolize sm one, plz consult a psychatrist, ur
mental situation is n't gud,
Anusha: u hav asked a gud question, but in d ques given
above, asked for maximum probablity, which can only b
achieve by transvrng n-1 balls, where n is the bal in a bag.
 
Is This Answer Correct ?    2 Yes 0 No
Tins
 
 
 
Answer
# 3
1/2 
Is This Answer Correct ?    0 Yes 0 No
Mohit Sharma
 
Answer
# 4
this is for Anusha. Mathematics is not for dumb heads like
u. plz donot try to abuse mathematics. according to me u r
a bal.
 
Is This Answer Correct ?    1 Yes 2 No
Pakhi
 
Answer
# 5
why shud we keep only 1 ball in 1st box we can take 2 balls
in 1st nd move 8 red balls to 2nd box thn the answer
changes........no suuficient data in the question
 
Is This Answer Correct ?    1 Yes 13 No
Anusha
 

 
 
 
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