© NCERT
not to be republished
PROBABILITY      573
(ii)
When the drawing is done without replacement, the probability of success
(i e , red ball) in first trial is 7
16 , in 2nd trial is 6
15 if the first ball drawn is red or
7
15  if the first ball drawn is black and so on Clearly, the probability of success is
not same for all trials, hence the trials are not Bernoulli trials