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2 years ago

(1 point for work, 1 point for correct answer) PLEASE HELP BEFORE WINTER BREAK NO LINKS HURRY

Mathematics

2 answers:

Elina [12.6K]2 years ago

4 0

(9+17)/4=26/4=6.5
So 6.5 is the answer

choli [55]2 years ago

4 0

6 1/2 or 6,5 or 13/2

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From a group of 3 men and 4 women, a delegation of 2 is selected. What is the expected number of men in the delegation?

Ostrovityanka [42]

Answer:

The expected number of men in the delegation is 0.86.

Step-by-step explanation:

Number of men = 3

Number of women = 4

A delegation of 2 is selected.

Let X be the number of men selected. So, the possible values of X are 0,1,2.

$P(X=0)=\dfrac{^3C_0\times ^4C_2}{^7C_2}=\dfrac{2}{7}$

$P(X=1)=\dfrac{^3C_1\times ^4C_1}{^7C_2}=\dfrac{4}{7}$

$P(X=2)=\dfrac{^3C_2\times ^4C_0}{^7C_2}=\dfrac{1}{7}$

The expected number of men in the delegation is

$E(x)=0\times P(X=0)+1\times P(X=1)+2\times P(X=2)$

$E(x)=0\times \dfrac{2}{7}+1\times \dfrac{4}{7}+2\times \dfrac{1}{7}$

$E(x)=\dfrac{6}{7}$

$E(x)\approx 0.86$

Therefore, the expected number of men in the delegation is 0.86.

4 0

3 years ago

What are the solutions to the equation (2x – 5)(3x – 1) = 0?

user100 [1]

Answer: $x=\frac{5}{2}, x=\frac{1}{3}$

Explanation:

The equation is:

$(2x-5)(3x-1)=0$

The term on the left consists of a product of two different factors: therefore, this product can be zero if either the first term (2x-5) or the second term (3x-1) is equal to zero.

This means that we can solve separately for the two terms:

$2x-5=0\\3x-1=0$

Solving the first equation:

$2x-5=0\\2x=5\\x=\frac{5}{2}$

Solving the second equation:

$3x-1=0\\3x=1\\x=\frac{1}{3}$

8 0

3 years ago

Read 2 more answers

Tristan has a box of toys, four out of 100 toys are red, 0.52 of the toys are green, and 0.1 of the toys are blue. Write the dec

kkurt [141]

Red toys, green toys, and then blue toys

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3 years ago

A real dollar bill measures 2.61 inches by 6.14 inches. A play dollar bill measures 3.61 inches by 7.14 inches. Is the play mone

Lynna [10]

No, it isn't. 2.61/6.14 is approximately 0.425, but 3.61/7.14 is about 0.506. If they were similar, than the answers would have to be the same. <span />

6 0

3 years ago

Sprawdz obliczenia i popraw błędy

shepuryov [24]

<span>Yo se la respuesta. será c

Good luck and have a nice day!</span>

3 0

3 years ago

(1 point for work, 1 point for correct answer) PLEASE HELP BEFORE WINTER BREAK​ NO LINKS HURRY

(1 point for work, 1 point for correct answer) PLEASE HELP BEFORE WINTER BREAK NO LINKS HURRY