Question

The mean score of 5 students for math is 405. The score of 3 students is 78,82, 85. The rest two students had the same score. What is the score of these two students?

Answer 1

890

Step-by-step explanation:

Let's assume the two students each scored an unknown x marks. The total of the 2 students will be x + x = 2x

We’ll add the 2x to the total of the three (3) students. Therefore the total for all five (5) students it will be;

78 + 82  + 85 + 2x

Their mean is 405. Therefore;

(78 + 82 + 85 + 2x) / 5 = 405

Lets solve the equation now;

245 + 2x = 405 * 5

2x = 2025 – 245

2x = 1780

X = 1780 / 2

X = 890

Learn More:

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