Answer:
one is 49/60
Step-by-step explanation:
15 is the GCF of 15 and 30, as 15 is the largest factor of 15 and 30.
So first we need to find the total number of boxes that the cookies could fit in:

Now we know that 47 boxes were made from this amount of cookies.
If Mr. Riley sells each box for 8, then we need to multiply the number of boxes by 8:

So Mr. Riley will collect a total of 376 from selling all of his cookies.
Let
denote the number of packages brought by customer
. If, for instance,
customers are in line, then the total number of packages is
, and

since the number of packages brought by any customer is independent from the number of packages brought by any other.
a.
is the probability that a total of 3 packages are waiting to get wrapped from among a total of 3 customers. This means each customer must have exactly one package. So

b.
is the probability that a total of 11 packages are brought by 4 customers. The only way for there to be 11 packages is if 3 customers bring 3 packages and the last 1 brings 2. There are
ways this can happen, so
