Finding a Missing Data Value Using the Mean

Clayton plays basketball on a team. He has played three
games so far. In the first game, he scored 10 points. In
the second game, he scored 14 points. In the third game,
he scored 6 points. What is Clayton's average points per
game?

• 30

• 12

• 3

• 10

Find the fifth number in this set so that the mean is 4.       3, 9, 2, 1, x

• 3

• 0

• 7

• 5

Find the missing value: 18, 17, 15, x, 16

• 14

• 20

• 15

• 12

The heights of six students in a class are given below:
158cm     172cm      164cm
164cm     167cm      159cm
 However, there were actually seven students in the class, and the mean height in the class was 165 cm. What was the height of the unknown student?

• 164 cm

• 166 cm

• 171 cm

• 169 cm

If the mean of a data set is 10, what is the missing piece of data? 
5, 4, 7, 15, 12, ___

• 7

• 17

• 20

• 16

Find the missing value: 11, 20, x, 7

• 18

• 14

• 15

• 19

Kevin constructed a shelf. He used five wooden planks with the following lengths: 25.6 inches, 34.2 inches, 44.9 inches, and 38.3 inches. If the mean length was 37.48 inches, what would be the length of the fifth plank?

• 44.4 inches

• 45 inches

• 37.48 inches

• 20 inches

Find the missing value: 19, x, 4, 12, 4

• 16

• 18

• 6

• 9

Mean: 5.95

Find the missing value: 8.7, 5.22, x, 0

• 9.88

• 9

• 5.5

• 8.25

Find x if 5, 9, 11, 12, 13, 14, 17 and x have a mean of 12.

• 15

• 16

• 17

• 18