A batch of 20 semiconductor chips is inspected by choosing a sample of 3 chips. Assume 10 of the chips do not conform to custome
1 answer:
Answer:
A batch of 20 semiconductor chips is inspected by choosing a sample of 3 chips. Assume 10 of the chips do not conform to customer requirements.
a) Number of different samples = 20C3 = =1140
b) 2 good and one bad chip
Number of samples = 10C2 * 10C1 = 45 * 10 =450
c) 2 good 1 bad + 1 good 2 bad + 3 bad
Number of samples = 10C2 * 10C1 + 10C1 * 10C2 + 10C3
=
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First, solve each side before we solve the inequality
4 − (x + 2)
−3x − 12
− (x+2)
4 − x − 2
*group the like terms*
− x + 4 − 2
− x + 2
−3(x + 4)
−3(x + 4)
3x − 12
− x + 2 < 3x − 12
subtract 2 from both sides
− x + 2 < −3x − 12
-2 -2
−x < − 3x − 14
add 3x to both sides
−x < − 3x − 14
+3x +3x
2x < − 14
divide both sides by 2
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