The probability that it will not rain at least 3 days in a row is 1/4.
Here the question says rain on at least three days CONSECUTIVELY
i.e. Exactly three days in row Days123 or days 234 or days 345 or days 1235 or days 1345
i.e. Exactly Four days Days1234 or days 2345
or exactly 5 days days 12345
Probability in each case = (1/2)^5
Required Probability = 8*(1/32) = 1/4
Answer: Option B = 1/4
Hence we get the required answer.
Learn more about Probability here:
brainly.com/question/25688842
#SPJ4