We have the formula to compute the probability of having exactly k successed over n trials, given a probability p of success (and implicitly a probability 1-p of failure), which is

Now, the probability of at least 3 successes is the union of the following event: exactly three successes,exactly four successes and exactly five successes.
We can compute their probability and sum them:
So, the answer is about 36.79%
Answer:
(6,1)
Step-by-step explanation:
You can see from the table that the y coordinate is always obtained by doubling the x coordinate and switching its sign. So, the relation is

To invert this function, we must solve for y. Simply divide both sides by -2 and we have

Rename the variables to get

Answer:
12 gallons
Step-by-step explanation: