ANSWER
EXPLANATION
From the given information, Elena chooses a number from 1 to 10.
The sample space is
S={1,2,3,4,5,6,7,8,9,10}
n(S)=10
The numbers greater than 5 are:
E={6,7,8,9,10}
n(E)=5
The probability that, she chooses a number greater than 5 is:
Substitute the values,
<u><em>Answer</em></u>
<u><em>Explanation</em></u>
Based on the given conditions, formulate::
Substitute into
::
Rearrange variables to the left side of the equation:
Calculate the sum or difference:
Divide both sides of the equation by the coefficient of variable:
Cross out the common factor: