Answer:
The probability is 
Step-by-step explanation:
Let assume that the number of computer produced by factory C is k = 1
So From the question we are told that
The number produced by factory A is 4k = 4
The number produced by factory B is 7k = 7
The probability of defective computers from A is 
The probability of defective computers from B is 
The probability of defective computers from C is 
Now the probability of factory A producing a defective computer out of the 4 computers produced is

substituting values


The probability of factory B producing a defective computer out of the 7 computers produced is

substituting values


The probability of factory C producing a defective computer out of the 1 computer produced is

substituting values


So the probability that the a computer produced from the three factory will be defective is

substituting values


Now the probability that the defective computer is produced from factory A is



Answer:
8 cm
Step-by-step explanation:
Answer: Your answer will be A
Hope this helps
Step-by-step explanation:
<span>(12.67 + 19.2)(3.99) / (1.36 + 11.366) = 31.87(3.99) / 12.726 = 127.1613 / 12.726 = 9.992</span>