A student scores 80, 90, 70, and 60 in four subjects. What score does he need in

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Question: A student scores 80, 90, 70, and 60 in four subjects. What score does he need in the fifth subject to achieve an average of 75?

Options:

Correct Answer: 85

Solution:

Total required for average of 75 = 5 * 75 = 375. Total of four scores = 80 + 90 + 70 + 60 = 300. Required score = 375 - 300 = 75.

A student scores 80, 90, 70, and 60 in four subjects. What score does he need in the fifth subject to achieve an average of 75?

A student scores 80, 90, 70, and 60 in four subjects. What score does he need in the fifth subject to achieve an average of 75?

Step 1: Understand that to find the average score, you need to add all the scores together and then divide by the number of subjects.
Step 2: The student has already scored in four subjects: 80, 90, 70, and 60.
Step 3: Calculate the total score of the four subjects: 80 + 90 + 70 + 60.
Step 4: Add the scores: 80 + 90 = 170, then 170 + 70 = 240, and finally 240 + 60 = 300.
Step 5: Now, to find out what score is needed in the fifth subject to achieve an average of 75, first calculate the total score needed for five subjects.
Step 6: Multiply the desired average (75) by the number of subjects (5): 5 * 75 = 375.
Step 7: Now, subtract the total score of the four subjects (300) from the total score needed (375): 375 - 300.
Step 8: Calculate the difference: 375 - 300 = 75.
Step 9: The student needs to score 75 in the fifth subject to achieve an average of 75.

Average Calculation – Understanding how to calculate the average score by dividing the total score by the number of subjects.
Total Score Requirement – Knowing how to determine the total score needed to achieve a specific average across multiple subjects.
Basic Arithmetic – Performing addition and subtraction to find the required score.