Can I have some help with this

From a population with u = 100 and o = 20, we randomly sample one element (X) from this population If the z-score (measure of relative standing) of X is 0.25, what is X? O 110 O None of the above O 95 105 O 90A binomial distribution has p = q = 0.5 and n = 100. If we are trying to approximate its probability using a normal approximation (applying the Central Limit Theorem) what is the standard deviation that we will use for this approximation? " 25 \\ S \" 50 " 1/4 ' None of the above