Question

a machine produces 20 defective articles in a batch of 400. after overhauling it produces 10 defective articles in a batch of 300. has the machine improved?

Answer 1

Answer:

YES.

Step-by-step explanation:

first we have to find the percentage of defective articles

in the first case : first find 1% of 400 articles : 400/100 = 4

                            second divide 20 with 4 to find the percent : 20/4 = 5%

so , before any changes the robot produces 5% defective articles from 400

in second case : first find 1% of 300 articles : 300/100 = 3

                            second divide 10 with 3 to find the percent : 10/3 = 3.333%

so yes , the robot improved

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