Calculate or Use a Table to Find the Binomial Probability $P ( x \geq 20 ) \text { when } n = 25 \text { and } p = .5$

question 78

Essay

Calculate or use a table to find the binomial probability $P ( x \geq 20 ) \text { when } n = 25 \text { and } p = .5$ . Also use the normal approximation to calculate the probability.