Thread: Data question to find missing variables

The table shows the weights of 100 children in class 1.
An estimate of the mean weight of the children is calculated as 44 kg.
Calculate the values of a and b.

w (kg) Frequency
20 < w <30 12
30 < w < 40 21
40 < w < 50 38
50 < w < 60 a

60 < w < 70 b

Answer a = ........................... , b = ...........................

ps last < should be greater OR equal to

How do I go about starting the problem?
Regards

Originally Posted by 200001

The table shows the weights of 100 children in class 1.

An estimate of the mean weight of the children is calculated as 44 kg.
Calculate the values of a and b.

w (kg) Frequency
20 < w <30 12
30 < w < 40 21
40 < w < 50 38
50 < w < 60 a

60 < w < 70 b

Answer a = ........................... , b = ...........................

ps last < should be greater OR equal to

How do I go about starting the problem?

Regards

.... (1)


.... (2)

Solve equations (1) and (2) simultaneously.

Thats great. Thanks