SAT One-variable data: distributions and measures of center and spread Practice Question 5 (Easy)

Question bank / One-variable data: distributions and measures of center and spread

Math · Problem-Solving and Data AnalysisEasy

The mean of five numbers is $18$ . Four of the numbers are $12$ , $20$ , $15$ , and $25$ . What is the fifth number?

Student-produced response: enter your answer.

Show answer and explanation

Answer: 18

The sum of the five numbers is $5 \times 18 = 90$ . The four known numbers sum to $12 + 20 + 15 + 25 = 72$ . The fifth number is $90 - 72 = 18$ .

Answering $72$ gives the sum of the four known numbers rather than the missing fifth number.

Ask Owl about this question Next question

Got it wrong? On SAT Owl, Owl looks at the answer you chose and explains the exact mistake, then gives you similar questions until it sticks. Get your predicted SAT score free.