Using the Given Frequency Distribution Table, How Many Students Made

question 62

Multiple Choice

Using the given frequency distribution table, how many students made B's (80 to 89) ? Frequency Distribution of 25 Test Scores
$$\begin{array} { | c | c | c | c | } \hline \begin{array} { c } \text { Class } \\\text { Interval }\end{array} & \text { Midpoint } & \text { lally } & \begin{array} { c } \text { Class } \\\text { Frequency }\end{array} \\\hline 45 - 49 & 47 & / & 1 \\\hline 50 - 54 & 52 & / & 1 \\\hline 55 - 59 & 57 & / / & 2 \\\hline 60 - 64 & 62 & / & 1 \\\hline 65 - 69 & 67 & / & 1 \\\hline 70 - 74 & 72 & / / & 2 \\\hline 75 - 79 & 77 & / / / & 3 \\\hline 80 - 84 & 82 & / / / & 3 \\\hline 85 - 89 & 87 & / / / & 3 \\\hline 90 - 94 & 92 & / \text { in } & 5 \\\hline 95 - 99 & 97 & / / / & 3 \\\hline\end{array}$$

• A)15
• B)6
• C)12
• D)3

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Definitions:

Substrate-level Phosphorylation

A metabolic process where ATP is produced by the direct transfer of a phosphate group to ADP from another phosphorylated compound.

Oxidative Phosphorylation

A metabolic pathway that uses energy released by the oxidation of nutrients to produce ATP, it takes place in the mitochondria.

Phosphofructokinase (PFK)

An important enzyme in the glycolytic pathway, regulating the rate of glucose breakdown by converting fructose-6-phosphate into fructose-1,6-bisphosphate.

Glucose-6-phosphate

A glucose sugar phosphorylated at the 6th carbon, playing a critical role in energy metabolism and the glycogen storage pathway.