Question

The mean weights of three group of students are 40kg, 45kg and 50kg respectively.if the number of students in the group are 45, 30 and 25 respectively, what are the mean weights of all the students?

Answer 1

Answer:

44kg

Step-by-step explanation:

First: (40kg * 45kids) + (45kg * 30kids) + (50kg * 25kids) = 4400kg in all

Next: Calculate how many kids there are - 45+30=25=100 kids

Finally, Divide 4400kg by 100 to get 44kg

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