There is $30$ chance that it rains on any particular day. Given that there is at least one rainy day in a week, what is the probability that there are at least two rainy days in the week?

Q. There is $30$% chance that it rains on any particular day. What is the probability that there is at least one rainy day within a period of $7$ days? Given that there is at least one rainy day, The probability that these are at least two rainy days is $(1-{\left(0.7\right)}^7);\frac{1-k{\left(0.7\right)}^7}{1-{\left(0.7\right)}^7}$. Find the value of $k$.

Q. There is $25$% chance that it rains on any particular day. What is the probability that there is at least one rainy day within a period of $7$ days?

Q. On an average if it rains on $10$ days in every $30$, the probability that there will be rain on at least three days of a given week is

Q. In a given day in the rainy season, it may rain 70% of the time. If the rains, chance that a village fair make a loss on that day is 80%. However, if it does not rain, chance that the fair will make a loss on that day is only 10%. If the fair has not made a loss on a given day in the rainy season, what is the probability that it has not rained on that day?

Q.

Last week, it rained on 5 days out of 7 days. The probability that if we pick a random day from the week, it will be a rainy day is