A) 20
B) 60
C) 30.5
D) 32.8
Correct Answer: D
Solution :
number of failures = 40% of 640 + 20% of 360 \[=\frac{40}{100}\times 640+\frac{20}{100}\ \times 360\] = 256 + 72 = 328 \[\therefore \] % of failures \[=\left( \frac{328}{640+360} \right)\,\times 100\] \[=\frac{328}{1000}\times 100=32.8%\]You need to login to perform this action.
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