A Sample of University Students Has an Average GPA of 2.78

A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45.What is the probability that a randomly selected student will have a GPA
$\begin{array}{|l|l|l|l|l|}\hline & & \text { Z score } &\quad\quad & \text { Probability } \\\hline \text { a. } & \text { Lessthan } 3.40 \text { ? } & & & \\\hline \text { b. } & \text { Lessthan } 3.78 \text { ? } & & & \\\hline \text { c. } & \text { more than } 3.50 \text { ? } & & & \\\hline \text { d. } & \text { more than } 2.50 ? & & & \\\hline \text { e. } & \text { bbetween } 2.00 \text { and } 3.00 ? & & \\\hline \text { f. } & \text { between } 3.00 \text { and } 3.50 ? & & & \\\hline\end{array}$

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