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%

Answer 1

Answer: 1.3%

Step-by-step 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 )$=\dfrac{D}{T}$

⇒P(defective )$=\dfrac{12}{890}=0.0134831460674$

In percent, P(defective )$=0.0134831460674\times100=1.34831460674\%=1.3%$

Hence, the probability that a calculator chosen at random will be defective = 1.3%

Answer 2

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.)