Question

If on an average 1 vessel in every 10 is wrecked, find the chance that out of 5 vessels expected 4 at least will arrive safely.
​

Answer 1

Probability of a vessel to arrive safely =  

10

9

​  

 

∴ Probability of at 5 vessels to arrive safely = Probability of all 5 arriving safely + Probability of 4 arriving safely

∴ Required probability =(  

10

9

​  

)  

5

+5×(  

10

9

​  

)  

4

×(  

10

1

​  

)=  

50000

45927

​  

 

Answer 2

Answer: 80%

Step-by-step explanation:

1/10 vessels =10%

4/5 vessels=80%

if you were to multiply 4/5 by 2 then you would get 8/10 which is also 80%