Answered

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Amy has 20 necklaces in a jewelry box. The probability of reaching into the jewelry box and pulling out a silver necklace is 0.85. What is the probability that Amy will reach in the jewelry box and pull out a necklace that is not silver?

Sagot :

MrRoyal

Answer:

0.15

Step-by-step explanation:

Given

[tex]Necklaces = 20[/tex]

Represent the probability of pulling out silver with p; So:

[tex]p = 0.85[/tex]

Required

Determine the probability of not pulling silver

This question is to test probability complements

And the complement rule of probability states that:

[tex]p + q = 1[/tex]

Where q and p are opposites. In other words:

q = probability of not pulling out silver

Substitute 0.85 for p in [tex]p + q = 1[/tex]

[tex]0.85 + q = 1[/tex]

Make q the subject

[tex]q = 1 - 0.85[/tex]

[tex]q = 0.15[/tex]

Hence, the required probability is 0.15

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