A student scores 80, 90, and 70 in three subjects. If he wants to achieve an ave

Practice Questions

A student scores 80, 90, and 70 in three subjects. If he wants to achieve an average of 85 after scoring in a fourth subject, what score does he need?

Questions & Step-by-Step Solutions

A student scores 80, 90, and 70 in three subjects. If he wants to achieve an average of 85 after scoring in a fourth subject, what score does he need?

Step 1: Add the scores of the three subjects: 80 + 90 + 70.
Step 2: Calculate the total score from Step 1: 80 + 90 + 70 = 240.
Step 3: Determine the total score needed for an average of 85 over 4 subjects: 4 * 85.
Step 4: Calculate the total score needed: 4 * 85 = 340.
Step 5: Find out how much more is needed by subtracting the current total score from the total score needed: 340 - 240.
Step 6: Calculate the score needed in the fourth subject: 340 - 240 = 100.

Average Calculation – Understanding how to calculate the average score based on total scores and the number of subjects.
Total Score Requirement – Determining the total score needed to achieve a desired average.
Basic Arithmetic – Performing addition and subtraction to find the required score.

A student scores 80, 90, and 70 in three subjects. If he wants to achieve an ave

Practice Questions

Questions & Step-by-Step Solutions

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