What will come in place of the question mark (?) in following equation? 2.25% of (80% of 800)

What will come in place of the question mark (?) in following equation?

2.25% of (80% of 800) – 1.5% of (60% of 800) =?

A 6.4

B 5.6

C 4.3

D 7.2

E None of these

Correct Answer: Option D

Follow BODMAS rule to solve this question, as per the order given below,

Step-1-Parts of an equation enclosed in 'Brackets' must be solved first,

Step-2-Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3-Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4-Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression:

⇒ 2.25% of (80% of 800) – 1.5% of (60% of 800) =?

⇒ ? = 2.25% of {(80/100) × 800} – 1.5% of {(60/100) × 800}

⇒ ? = 2.25% of 640 – 1.5% of 480

⇒ ? = (2.25/100) × 640 – (1.5/100) × 480

⇒ ? = 14.4 - 7.2

⇒ ? = 7.2

Hence, the required answer is 7.2