Han Zhi Yuan's answer to Jackson R's Primary 6 Maths Data Analysis Singapore question.
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Average number of employees between the 4 companies
= (25+40+50+Z) / 4 .
We know that Z - 5 = (25+40+50+Z) / 4.
So 4(Z-5) = 115 + Z.
=> 4Z - 20 = 115 + Z
=> 3Z = 135
=> Z = 45.
Altogether there are 115 + 45 = 160 employees.
= (25+40+50+Z) / 4 .
We know that Z - 5 = (25+40+50+Z) / 4.
So 4(Z-5) = 115 + Z.
=> 4Z - 20 = 115 + Z
=> 3Z = 135
=> Z = 45.
Altogether there are 115 + 45 = 160 employees.
Date Posted:
4 years ago
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