A bin contains 72 light bulbs of which 10 are defective. If 5 light bulbs are randomly selected from the bin with replacement, f
1 answer:
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Answer:
Step-by-step explanation:
Required
As a decimal to nearest thousandth
Solving (a): 78.4%
Express as fraction
Solve fraction
----- This is already in thousandth place
Solving (b): 29%
Express as fraction
Solve fraction
Approximate
Answer:
c) 6
Step-by-step explanation:
This is a straight-forward application of the Law of Cosines:
... a² = b² + c² -2bc·cos(A)
... a² = 8² +11² -2·8·11·cos(32.2°) ≈ 64 +121 -176·0.8462
... a² ≈ 36.07000
... a ≈ 6.00583
The best choice is c) 6.
