The first working out is correct, z = 3
The solution is x>18.
The problem tells us that 3 less than a number: x-3
is more than 15. >15
So the inequality is x-3>15. When we isolate x to simply the inequality, we add 3 to both sides, to get x>18.
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Answer: 120 Packages
Step-by-step explanation:
Given
75 random packages are check
3 package is found faulty
So, the percentage of error is
i.e. 4% packages is faulty
For 3000 sample, expected faulty packages are
Answer:
18, 22
Step-by-step explanation:
Half of 40 is 20 right? Then one number has to be 2 less, while the other number is 2 more. So there is a difference of 4.
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