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3 years ago

This is the last one

Mathematics

2 answers:

enyata [817]3 years ago

7 0

Answer and Step-by-step explanation:

To get the answer, you must add 3 to both sides to get s by itself.

s - 3 + 3 = -10 + 3

This is the answer.

s = -7

#teamtrees #PAW (Plant And Water)

qaws [65]3 years ago

3 0

+3 to both sides and you get s = -7

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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%

Final answer:-

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

P(E) = 0.067 = 6.71%

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