Answer:
Let
A be the number of balls marked with ?x?, then A has the binomial distribution
with
P(all
balls with bear ?x? mark)
(ii)
Let B be the number of balls marked with ?y? then B has the binomial
distribution with n = 6,
P(not
more than 2 will bear ?y? mark)
(iii)
P (atleast one ball will bear ?y? mark)
(iv)
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