Answer:1,0.5, or 0 it depends
Explanation:
The probability that one event occurred depends on the total of random event, being 1 the most of the probabilities
If the two marbles are blue the probability to select a marble blue is 1
If one of the marbles is blue and the other marble is of any color the probability to select the blue marbles is:
P=1 - 1/2=1/2
Being 1/2 or 0.5 the answer
If any of the marbles are blue then the probabilities are 0
 
        
             
        
        
        
Answer: 1:4
Step-by-step explanation:
3:12 written as a fraction is 3/12
Simplify:
3/12 = 1/4
 
        
             
        
        
        
65:100 because there are 65 girls and then 65 girls + 35 boys = 100 total students
        
             
        
        
        
Answer:
Pretty sure it's (4, -5)
Step-by-step explanation:
If not, shoot me I guess.