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Vsevolod [243]
3 years ago
15

15 out of 25 students are boys in class. What percent are boys and what is the ratio in class?

Mathematics
1 answer:
alex41 [277]3 years ago
7 0
Divide 15 by 25.
15÷25=0.6
0.6=60%
60% are boys and the ratio of boys is 3:5
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Find the exact value. cos150°
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ANSWER

\cos(150 \degree)  =    -  \frac{ \sqrt{3} }{2}

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We want to find the exact value of cos(150°).

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The cosine ratio is negative in the second quadrant.

Using the unit circle,

\cos(150 \degree)  =  - \cos(30 \degree) =   -  \frac{ \sqrt{3} }{2}

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sleet_krkn [62]

Answer:

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Step-by-step explanation:

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Solution :

Applying binomial distribution,

Here n=12 and p=0.5

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From least to greatest 2.3, 2 4/5, 2.6
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