A class has 20 students with an average height of 150 cm. If a new student with

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Question: A class has 20 students with an average height of 150 cm. If a new student with a height of 160 cm joins, what will be the new average height?

Options:

Correct Answer: 155

Solution:

Total height = 20 * 150 = 3000. New total height = 3000 + 160 = 3160. New average = 3160 / 21 = 150.48.

A class has 20 students with an average height of 150 cm. If a new student with

Practice Questions

A class has 20 students with an average height of 150 cm. If a new student with a height of 160 cm joins, what will be the new average height?

Questions & Step-by-Step Solutions

A class has 20 students with an average height of 150 cm. If a new student with a height of 160 cm joins, what will be the new average height?

Step 1: Calculate the total height of the 20 students. Multiply the average height (150 cm) by the number of students (20). Total height = 20 * 150 = 3000 cm.
Step 2: Add the height of the new student (160 cm) to the total height. New total height = 3000 cm + 160 cm = 3160 cm.
Step 3: Calculate the new average height. Divide the new total height (3160 cm) by the new total number of students (21). New average height = 3160 cm / 21 = 150.48 cm.

Average Calculation – Understanding how to calculate the average by summing values and dividing by the number of values.
Impact of New Data – Recognizing how the addition of new data points affects the overall average.

A class has 20 students with an average height of 150 cm. If a new student with

What’s inside this PDF?

A class has 20 students with an average height of 150 cm. If a new student with

Practice Questions

Questions & Step-by-Step Solutions

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