Question

Bag contains 4 white, 7 black and 5 red balls. 4 balls are drawn with replacement. show that the probability of at least two balls are white is 6725667256.*

Answer 1

yellow solution ok it's ok

Answer 2

Answer: 67/256

Step-by-step explanation:

p=1/4 q=3/4 n=4

P(r)=4cr(1/4)^r(3/4)^n-r

Now required probability=1-P(x=0)-P(x=1)

=1-[81/256+27/64]

=67/256