Question

1. a student has four test scores: 84, 90, 86, and a missing score. if the mean of all four scores is 88, what is the missing score? a) 88 b) 90 c) 92 d) 94 10. a student recorded the number of pages read each day: 12, 15, 14, 16, 13, 12. what is the range of pages read? a) 3 b) 4 c) 5 d) 6

Explanation:

Step1: Find total of 4 scores

$\text{Total} = 88 \times 4 = 352$

Step2: Sum known scores

$84 + 90 + 86 = 260$

Step3: Calculate missing score

$352 - 260 = 92$

Step4: Find max and min pages

$\text{Max}=16, \text{Min}=12$

Step5: Compute range

$16 - 12 = 4$

Answer:

1. C) 92
2. B) 4