Consider the polynomial
The rational zeros could be only of form c/d, where c is integer number among divisors of the last term (-15) and d is integer number among divisors of the first term (1).
The divisors of -15 are:
The divisors of 1 are:
Possible rational zeros:
Check them:
There are no rational zeros.
Answer:
<em>The probability that neither box contains a prize is 0.5625 or 56.25%</em>
Step-by-step explanation:
<u>Independent Events</u>
It's referred as to the case when the probability of success (or failure) of the event A doesn't interfere with the probability of B. In this question we'll assume there are enough boxes of cereal of each type to make the choosing of one of them affect very little the choosing of the other one.
Let's call p=0.25 to the probability of getting a cereal box with a prize, and q=0.75 to the negation of p, i.e. the probability of getting a ceral box without a prize. There are four possible combinations: {pp,pq,qp,qq}. We need to find the probability of the combination qq. We compute it as the product of the individual probabilities
In other words, the probability that neither box contains a prize is 0.5625 or 56.25%