Answer:
[tex]Mean = 79\%[/tex]
Step-by-step explanation:
Given
[tex]Mean_3 = 90\%[/tex]
[tex]4th\ score =46\%[/tex]
Required
The mean of the 4 subjects
Mean is calculated as:
[tex]Mean = \frac{Total}{n}[/tex]
For: [tex]Mean_3 = 90\%[/tex]
[tex]Mean = 90\%\ n = 3[/tex]
So:
[tex]90\% = \frac{Total}{3}[/tex]
[tex]Total = 3 * 90\%[/tex]
[tex]Total = 270\%[/tex] --- this is the total in the 3 subjects
The mean of the 4 subjects is:
[tex]Mean = \frac{Total\ of\ 4\ subjecte}{4}[/tex]
[tex]Mean = \frac{270\% + 46\%}{4}[/tex]
[tex]Mean = \frac{316\%}{4}[/tex]
[tex]Mean = 79\%[/tex]
