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Instructions
Directions for the next 2 questions:
A, B, C are three numbers.
Let @(A, B) = average of A and B,
/(A, B) = product of A and B, and
X(A, B) = the result of dividing A by B
Solution
Considering option,
In 1st we get product of a and b which is not required In 2nd we get fraction 1.5 which doesnt help in finding average In 3rd we get (a+b)/4 after 2 operations which doesn't give average in further operations. only in 4th option we get overall and exact average of A , B and C .
/(X(@ (/(@(B, A), 2), C), 3), 2) = /(X(@ (/(A+B)/2), 2), C), 3), 2)
= /(X(@ (A+B), C), 3), 2) = /(X((A+B, C)/2, 3), 2)
= /[(A+B+C)/6,2]
= (A+B+C)/3
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