PARCC Averages and Rounding Practice Questions 2

Question 1

What is the mean of the data set: 14, 22, 8, 30, 16?

Accepted Answer

18

Answer

Add all values: 14 + 22 + 8 + 30 + 16 = 90. Divide by the number of values (5): 90 ÷ 5 = 18.

Question 2

A student scored 82, 76, 91, and 85 on four tests. What score does the student need on a fifth test to achieve an average of 85?

Accepted Answer

91

Answer

The desired total for 5 tests at an average of 85 is 5 × 85 = 425. Current total: 82 + 76 + 91 + 85 = 334. Needed: 425 − 334 = 91.

Question 3

Round 3.8472 to the nearest hundredth.

Accepted Answer

3.85

Answer

The hundredths digit is 4. The digit to the right (thousandths place) is 7, which is ≥ 5, so round up: 3.85.

Question 4

The temperatures for five days were: 68°F, 74°F, 71°F, 69°F, and 73°F. What is the mean temperature, rounded to the nearest whole number?

Accepted Answer

71°F

Answer

Sum: 68 + 74 + 71 + 69 + 73 = 355. Mean: 355 ÷ 5 = 71. The mean temperature is 71°F.

Question 5

Which number, when rounded to the nearest ten, gives 250?

Accepted Answer

245

Answer

Numbers from 245 to 254 round to 250 when rounded to the nearest ten. 245 is within this range and rounds up to 250.

PARCC Practice Test