A teacher has 5 students with average marks of 70. If one student scores 90, wha

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Question: A teacher has 5 students with average marks of 70. If one student scores 90, what will be the new average?

Options:

Correct Answer: 74

Solution:

Total marks of 5 students = 5 * 70 = 350. New total = 350 + 90 = 440. New average = 440 / 6 = 73.33, rounded to 74.

A teacher has 5 students with average marks of 70. If one student scores 90, what will be the new average?

A teacher has 5 students with average marks of 70. If one student scores 90, what will be the new average?

Step 1: Calculate the total marks of the 5 students using the average. Multiply the average marks (70) by the number of students (5). Total marks = 70 * 5 = 350.
Step 2: Add the score of the new student (90) to the total marks. New total marks = 350 + 90 = 440.
Step 3: Count the total number of students now, which is 5 original students + 1 new student = 6 students.
Step 4: Calculate the new average by dividing the new total marks (440) by the total number of students (6). New average = 440 / 6 = 73.33.
Step 5: Round the new average to the nearest whole number. The new average rounded is 74.

Average Calculation – Understanding how to calculate the average by summing total marks and dividing by the number of students.
Impact of Additional Scores – Recognizing how adding a new score affects the overall average.