Question 635717
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Hi,
A sample of 320 mobile phone batteries contained 16 defective batteries. 
How many{{{highlight(x)}}}  defective batteries would you expect to find in a sample of 3000
Inquiry Sets Up the Proportion
{{{16/320 = x/3000}}}     
{{{1/20 = x/3000}}}     | Cross Multiply to solve for x