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3 years ago

11

What percent of pure gold is in a watchcase that is 16 carats fine? In a chain that is 12 carats fine? In a ring that is 14 cara

ts fine?

2 answers:

slavikrds [6]3 years ago

5 0

Answer:

In 16 carats : 66.67%

In 12 carats : 50%

In 14 carats : 58 1/3%

Step-by-step explanation:

const2013 [10]3 years ago

3 0

14 carats is 58.30% gold
12 carats is 50.00% gold
16 carats is 66.67% gold

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He need to have at least an 83

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3 years ago

Eric's class consists of 12 males and 16 females. If 3 students are selected at random, find the probability that they

Reptile [31]

Answer:

The probability that all are male of choosing '3' students

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Step-by-step explanation:

Let 'M' be the event of selecting males n(M) = 12

Number of ways of choosing 3 students From all males and females

$n(M) = 28C_{3} = \frac{28!}{(28-3)!3!} =\frac{28 X 27 X 26}{3 X 2 X 1 } = 3,276$

Number of ways of choosing 3 students From all males

$n(M) = 12C_{3} = \frac{12!}{(12-3)!3!} =\frac{12 X 11 X 10}{3 X 2 X 1 } =220$

The probability that all are male of choosing '3' students

$P(E) = \frac{n(M)}{n(S)} = \frac{12 C_{3} }{28 C_{3} }$

$P(E) = \frac{12 C_{3} }{28 C_{3} } = \frac{220}{3276}$

P(E) = 0.067 = 6.71%

<u><em>Final answer</em></u>:-

The probability that all are male of choosing '3' students

P(E) = 0.067 = 6.71%

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3 years ago

6=a/4+6 I need the answer for math please

tangare [24]

Answer:

a = 60

Step-by-step explanation:

4 + 6 = 10

6 = a/10

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Hope this helps!

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2 years ago

Read 2 more answers

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