Javon's first 3 quizzes had a mean score of 90%. If he scores 46% on his next quiz, what will be his mean quiz score for these 4 quizzes?

Step-by-step explanation:

Given

Required

The mean of the 4 subjects

Mean is calculated as:

For:

So:

--- this is the total in the 3 subjects

The mean of the 4 subjects is:

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

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