Question

The damage and repair log of a robot are given below.
Damaged: 11%
Repaired: 5/2%
Damaged: 7/4%
Repaired: 3%
The functionality of this robot is .

• A. 91.75%
• B. 92%
• C. 93.5%
• D. 92.75%

Answer 1

The correct option is D 92.75%

Subtracting the damaged parts and adding the repaired ones to calculate the working status, we have:


100 + (-11) + $\frac{5}{2}$ + (-$\frac{7}{4}$) + (3)
[by commutative property ]

= (100 - 11 + 3) + ($\frac{5}{2}$ - $\frac{7}{4}$ )
[by associative property]

= 92 + $\frac{10-7}{4}$

= 92 + $\frac{3}{4}$

= 92.75%

Hence, the functionality of the robot is 92.75%.