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3 years ago

Solve the equation.

Mathematics

2 answers:

DENIUS [597]3 years ago

6 0

Hello :)

11,3x+7,2=86,3
⇔11,3x=86,3-7,2=79,1
⇔x=79,1/11,3= 7

The answers is c) 7 :).

Oduvanchick [21]3 years ago

4 0

Answer:

The correct option is C) 7.

Step-by-step explanation:

Consider the provided equation.

$11.3x+7.2=86.3$

We need to solve the provided equation for x.

Subtract 7.2 from both side.

$11.3x+7.2-7.2=86.3-7.2$

$11.3x=79.1$

Divide both sides by 11.3.

$\frac{11.3x}{11.3}=\frac{79.1}{11.3}$

$x=7$

Hence, the value of the equation is x=7.

Thus the correct option is C) 7.

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So, the possibilities that at-least 3 out of 5 students receive version A are,

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2) 4 receives version A and 1 does not receive version A

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Then the probability that at-least 3 out of 5 students receive version A is given by,

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= $(\frac{1}{4})^3\times (\frac{3}{4})[\frac{3}{4}+\frac{1}{4}+(\frac{1}{4})^2]$

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