John's lottery get prize on any given day is 1/2. What is the probability that it get prize on 4 out of 7 consecutive days?  Choose the correct choice from the following options:
A) 4/7	B) 3/7	C) 31/128	D) 4/28	E) 35/128
using Binomial. theorem   nCr (p)^r (q)^n-r   7C4 (1/2)^4 (1/2)^r   which is 35/128   Answer is 35/128
<result>E</result>
John's lottery get prize on any given day is 1/2. What is the probability that it get prize on 4 out of 7 consecutive days?