In a batch of 890 calculators, 12 were found to be defective. What is the probability that a calculator chosen at random will be defective? Write the probabilit
Mathematics
theboldtomorethanone
Question
In a batch of 890 calculators, 12 were found to be defective. What is the probability that a calculator chosen at random will be defective? Write the probability as a percent. Round to the nearest tenth of a percent if necessary.
A.74%
B.1.3%
C.98.7%
D.1.8%
A.74%
B.1.3%
C.98.7%
D.1.8%
2 Answer

1. User Answers Equanimity
12/890 are defective. x/100 are defective.
Multiply 12 by 100 and 890 by x.
1200/890x.
1200/890=1.34
There is a 1.3% chance.
Your answer is B.) 
2. User Answers JeanaShupp
Answer: 1.3%
Stepbystep explanation:
Given: The number of calculators T= 890
The number of defective calculators D= 12
Now, the probability that a calculator chosen at random will be defective is given by :
P(defective )[tex]=\dfrac{D}{T}[/tex]
⇒P(defective )[tex]=\dfrac{12}{890}=0.0134831460674[/tex]
In percent, P(defective )[tex]=0.0134831460674\times100=1.34831460674\%=1.3%[/tex]
Hence, the probability that a calculator chosen at random will be defective = 1.3%