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3 years ago

10

The teachers had to transport 166 students by bus on a field trip. Each bus holds 65 students. How many buses do they need to or

der so no one is left behind?

2 answers:

Oksanka [162]3 years ago

7 0

In order for no one to be left behind you would need 3 buses because you cant have 2.5 buses.
Hope that answers your question

Aleksandr-060686 [28]3 years ago

3 0

3 busses are needed for all of the kids

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5x+9=2x+7+3x-15

andrew11 [14]

Answer:

No Solutions

Step-by-step explanation:

Step 1:

5x + 9 = 2x + 7 + 3x - 15 Equation

Step 2:

5x + 9 = 5x - 8 Add and Subtract

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9 = - 8 Subtract 5x on both sides

Answer:

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An expression is shown 342 / 8 What is the quotient expressed as a fraction?

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4 years ago

A glass box shaped like a rectangular prism has width 7 inches, length 9 inches, and height 12 inches. It is being shipped in a

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Answer:

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Volume (prism) = Bh, where B = area of the base, h = height

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3 years ago

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.

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