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One-Variable Data: Distributions and Measures of Center and Spread

SAT Math· difficulty 3/5

Sara's quiz scores are 85, 90, 78, 92. What score must she get on her 5th quiz to have an average of 88?

  • A

    98

  • B

    95

    check_circle
  • C

    90

  • D

    92

Explanation

Total needed = 5×88=4405 \times 88 = 440. Current sum = 85+90+78+92=34585+90+78+92 = 345. Need = 440−345=95440 - 345 = 95.

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