Direction: Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to study the questions and decide the data in which of the statements are sufficient to answer the questions.
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What is the average salary of 15 employees?
I. Average salary of 7 clerical cadre (out of the 15 employees) employees is $ 8500.
II. Average salary of 5 officer cadre (out of the 15 employees) employees is $ 10000.
III. Average salary of the 3 sub-staff employees (out of the 15 employees) is $ 2500.
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- None
- Only I
- Only II
- Only III
- Question cannot be answered even within formation in all three statements.
Correct Option: B
From above given all statements , we have
I. Average salary of 7 clerical cadre employees = $ 8500.
Sum of salary of 7 clerical cadre employees = $ 8500 x 7 = $ 60000
II. Average salary of 5 officer cadre employees = $ 10000.
Sum of salary of 5 officer cadre employees = $ 10000 x 5 = $ 50000
III. Average salary of the 3 sub-staff employees = $ 2500.
Sum of salary of 3 sub-staff employees = $ 2500 x 3 = $ 7500
Average salary of 15 employees = Sum of salary of 7 clerical cadre employees + Sum of salary of 5 officer cadre employees + Sum of salary of 3 sub-staff employees = 60000 + 50000 + 7500 = $ 117500/15 = $ 7834
