Given:
Total number of marbles = 15
Probability of randomly selecting a green marble =
.
Probability of randomly selecting a green marble, replacing it, and then randomly selecting a blue marble =
.
To find:
The number of blue marbles.
Solution:
Let the number of blue marbles be x.


It is given that,

Probability of randomly selecting a green marble, replacing it, and then randomly selecting a blue marble is
. So,



Multiply both sides by 75.



Therefore, the number of blue marbles in the bag is 6.
Answer:
1.166 per 1000 of population
Step-by-step explanation:
Given the following :
Newly recorded cases of invasive cervical cancer = 723
Period of time = 1975 - 1984 ( inclusive)
Estimated average Population of white women in the area at the time = 620,000
Average annual. Incidence rate invasive of cervical cancer in the population.
Incidence rate = (new cases / total population) × 10^n
Incidence rate = (723/620000) × 10^n
= 0.0011661
= 1.166 per 1000 of population
Answer:
..
Step-by-step explanation:
The answer is -1296/7. Or in short form -185 1/7