Answered

Westonci.ca is the Q&A platform that connects you with experts who provide accurate and detailed answers. Join our platform to connect with experts ready to provide precise answers to your questions in various areas. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

The mean weight of 45 boys is 65kg and 37 girls is 45kg and that of 5 teachers is 70kg. What is the average weight of the whole class included the teachers?

Sagot :

MrRoyal

Answer:

The average weight of the whole class is: 56.78kg

Explanation:

Given

[tex]\bar x_{boys} = 65[/tex]

[tex]n_{boys} = 45[/tex]

[tex]\bar x_{girls} = 45[/tex]

[tex]n_{girls} = 37[/tex]

[tex]\bar x_{teachers} = 70[/tex]

[tex]n_{teachers} = 5[/tex]

Required

The average of the whole class.

This requires that we calculate the population average

This is calculated as:

[tex]\mu = \frac{\sum n_i * \bar x_i}{\sum n}[/tex]

So, we have:

[tex]\mu = \frac{45 * 65+ 37*45+5*70}{45+37+5}[/tex]

[tex]\mu = \frac{4940}{87}[/tex]

[tex]\mu = 56.78[/tex]

We hope this was helpful. Please come back whenever you need more information or answers to your queries. We appreciate your time. Please come back anytime for the latest information and answers to your questions. Thank you for using Westonci.ca. Come back for more in-depth answers to all your queries.