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

Answer:
18 years
Step-by-step explanation:
Given:
Birds bakery has been open 3 times longer than Bridget's bakery.
And Bridget's bakery has been open for 6 years.
So, the Birds bakery open time = 3
Bridget's bakery open time
Birds bakery open time = 3
6
Birds bakery open time = 18 years
Therefore, the Birds bakery has been open for 18 years.
Answer:
12/5
Step-by-step explanation:
tan is o/a
so 24/10
simplify that
would be
12/5
Answer:
The side length of the cube is 5 cm. Then the volume is simply 5\times 5\times5 = 125
LxWxH