There are

ways of selecting two of the six blocks at random. The probability that one of them contains an error is

So

has probability mass function

These are the only two cases since there is only one error known to exist in the code; any two blocks of code chosen at random must either contain the error or not.
The expected value of finding an error is then
I think it’s 5. I’m not sure
Answer:
The dimensions of the scaled rectangle are
of length by
of width
Step-by-step explanation:
we know that
The scale factor is equal to 
Remember that

The scale factor is less than 1
so
the dilation is a reduction
To find the dimensions of the scaled rectangle multiply the dimensions of the original rectangle by the scale factor


You can't solve it, but you can simplify it
-2/3 * (12c - 9) + 14c = -2/3*12c - (-2/3)*9 + 14c = -8c + 6 + 14 c = 6c + 6
A +b = 90c = 1/2(86)=43
a + b + c = 133