1 votes 1 votes A box contains 5 black and 5 red balls. Two balls are one after another from the box, without replacement. The probability of both balls being red is a) 1/90 b) 1/5 c) 19/90 d) 2/9 Probability isro-ece engineering-mathematics probability + – sh!va asked Mar 4, 2017 • edited Mar 8, 2019 by Naveen Kumar 3 sh!va 335 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 1 votes 1 votes with replacement =(5/10) x (5/10) =1/4 without replacement = (5/10) x (4/9) =20/90=2/9 hence ans is D Sanjay Sharma answered Mar 4, 2017 • selected Apr 10, 2017 by Deepthi_ts Sanjay Sharma comment Share Follow See all 0 reply Please log in or register to add a comment.