ANSWER :

28. Jeff has grades: 86, 90, 92, 88 in his Mathematics subject from first quarter What is his average in Math?

• a.88
• B. 89
• c.90
• d. 91

In finding the average of a given data set, you need to add all the given numbers then divide it equal to the number of the given data set.

• Given : 86,88,90,92
• Add : 86 + 88 + 90 + 92 = 356
• Divide equal to the number in the given set : 356 ÷ 4
• 89 is the average.

29. What is the median age of a group of students whose ages are 36, 38, 18,10, 16, 17, 15?

• a. 10
• b. 15
• c. 16
• D. 17

The median is the number in the center in the given data set, for finding the median, arrange the given data set in increasing.

• Given : 36,38,18,10,16,17,15
• Arrange : 10,15,16,17,18,36,38
• The number in the Center of the Set : 17
• Hence, the Median is 17

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