Variance 02 l V(X) of each Random Variable r> Andre is paid Php 20.00 whenever the results of tossing two coins are both heads but pays Php 10.00 whenever the results are not heads. What is the variance and standard deviation? Variance (:2 lV(X) of each Random Variable Your mom said. if in one grading period your grade in math is 90 and above, she will add Php 300.00 to your daily allowance, Php 150.00 if your grade is 80 - 89, but decrease it by Php 100.00 if your grade is 79 and below. If the probability to get 90 and above is 12%. while you have 45% chance to get 80 - 89, what is the standard deviation of your possible allowance per quarter