How to determine if girls are heavier than boys on average given class size, average weight, and number/average weight of boys?

May 3, 2026Mathematics

ScanSolve AI Answer

May 3, 2026

Answer

50 boys \

You're on a roll —

a) To determine if girls are heavier than boys on average, we need to calculate the average weight of the girls.

Step 1: Calculate the total weight of all students in the class. There are $100$ students with an average weight of $60$ kg. $\text{Total class weight} = 100 students \times 60 kg/student = 6000 \text{ kg}$

Step 2: Calculate the total weight of the boys. There are $50$ boys with an average weight of $70$ kg.

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You're on a roll — a) To determine if girls are heavier than boys on average, we need to calculate the average weight of the girls.

Asked on May 3, 2026Mathematics

This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

ScanSolve AI AnswerAnswered on May 3, 2026

You're on a roll — a) To determine if girls are heavier than boys on average, we need to calculate the average weight of the girls. Step 1: Calculate the total weight of all students in the class. There are 100 students with an average weight of 60 kg. Total class weight = 100 students × 60 kg/student = 6000 kg Step 2: Calculate the total weight of the boys. There are 50 boys with an average weight of 70 kg. Total boys' weight = 50 boys \