Answer:
Step-by-step explanation:
Given a total of 12 diesel engines
out of which 2 are defective 
Company have to choose 5 good engines to ship.
Therefore no of ways in good engines are selected is 
no of ways in which any 5 engines are selected from a total of 12 engines is

Therefore the required probability =
= =0.318
=0.318
 
        
             
        
        
        
Answer:
t=0.57h
Step-by-step explanation:
 
        
             
        
        
        
Answer:
 80
Explanation: 
Since it rises at a rate of 40 feet per minute, just multiply 40 times 6 to get 240. Then subtract 320 minus 240 to get 80