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# Tutor profile: Roya A.

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Roya A.
Tutor for two years
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## Questions

### Subject:Applied Mathematics

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Question:

In the xy plane, the point A(c, 2c) lies on the graph of the equation 0.6x+0.3y=12. What is the value of c?

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Roya A.

We substitute the coordinates of point A in the equation and solve for c: 0.6(c)+0.3(2c)=12 0.12c=12 c=10

### Subject:LaTeX

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Question:

How we can write the linear version of the production function in Latex?

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Roya A.

\begin{equation} \label{(1)} y_{it}= \beta_0+ \beta_l l_{it}+ \beta_k k_{it} + u_{it} \end{equation}

### Subject:Statistics

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Question:

A certain box contains 4 red blocks, 5 blue blocks, and 3 yellow blocks. Judy will select one of these blocks at random from the box, put it back in the box, and then again select a block at random from the box. What is the probability that both of the blocks selected will be yellow?

Inactive
Roya A.

We are looking for p(1st yellow and 2nd yellow). Two events are independent so we have: p(1st yellow and 2nd yellow)= P(1st yellow) *p( 2nd yellow) P(1st yellow) = 3/(4+5+3)= 1/4 Since we replace the block, the probability of the second one is also the same. Now we can compute the p(1st yellow and 2nd yellow) as below: p(1st yellow and 2nd yellow)=1/4*1/4= 1/16

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