Here is my question<br><br><img src="http://mathhelpforum.com/attachment.php?attachmentid=32147&stc=1" attachmentid="32147" alt="" id="vbattach_32147" class="previewthumb">
$\displaystyle \dfrac{1}{n} * \prod_{k=1}^nX_k = \dfrac{1}{n} * \left(X_1 * X_2 * ...\ X_n\right).$
The repeated product symbol of $\Pi$ applies to what is to the right of the symbol. Use of parentheses can be helpful.
$\displaystyle \prod_{k=1}^n\left(\dfrac{1}{n} * X_k\right) = \left(\dfrac{1}{n}\right)^n * \left(X_1 * X_2 * ...\ X_n\right).$
By the way, "I wanna an answer" is a rude way to ask for help.