<em>We know that two odd numbers make an even number and two even numbers make another even number. </em><span><em>So out of the first choice you have a 7/15 chance of getting it even and an 8/15 chance of getting it odd. </em></span>
<span><em>If you get the first one even, then the second one MUST also be even so you multiply 7/15 with itself. </em></span>
<span><em>If you get the first one odd, then the second one MUST also be odd so you multiply 8/15 with itself as well. </em></span>
<span><em>You should have: </em></span>
<span><em>(7/15) x (7/15) </em></span>
<span><em>and </em></span>
<span><em>(8/15) x (8/15) </em></span>
<span><em>By multiplying the top portions with each other and the bottom portions with each other you get: </em></span>
<span><em>49/225 and 64/225 respectively. </em></span>
<span><em>Add both fractions together to get your answer. </em></span>
<span><em>Your answer should be (64+49)/225 = 113/225 </em></span>
A negative correlation is a relation where one variable goes up and another variable goes down. One variable in this is the volley ball time. Another is the amount of free time. As the time spent on volley ball goes up, the free time goes down and vice versa.