Waec Model Questions Vol6 2024 Mathematics Question 49

Practice objective / multiple choice question 49 from the 2024 Waec Model Questions Vol6 Mathematics examination.

Waec Model Questions Vol6 2024 Mathematics Objective / Multiple Choice Hard Difficulty
Question 49 WAEC_MODEL_QUESTIONS_VOL6 • 2024 • MATHEMATICS • objective

Eight students obtained the following test scores: 58, 62, 70, 74, 78, 82, and two equal scores x. The mean of all eight scores is 70 and the median is 69. Determine the value of x and, after the two scores x are added, the standard deviation of the eight scores is 8.5. Find the sum of the squares of the original six scores (58, 62, 70, 74, 78, 82).

Answer Options

A. Missing \(score = 68\); sum of \(squares = 30400\)
B. Missing \(score = 66\); sum of \(squares = 30420\)
C. Missing \(score = 70\); sum of \(squares = 30600\)
Correct Answer D. Missing \(score = 68\); sum of \(squares = 30530\)
Correct Answer
D
Correct Option:
Missing \(score = 68\); sum of \(squares = 30530\)

About This Question

This is Waec Model Questions Vol6 2024 Mathematics Question 49. It is one of the objective questions from the 2024 Waec Model Questions Vol6 Mathematics examination.

Difficulty level: Hard .

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