Correct Answer - Option 3 : 1600

Given:

Total number of girls in school is 720

55% of the students are boys.

Calculation:

Out of 100%, 55% are boys,

Number of Girls,

⇒ 100 – 55 = 45%

According to the question,

⇒ 45% = 720

⇒ 1% = 720/45

⇒ 1% = 16

Total number of students,

⇒ 100 × 16

⇒ 1,600

∴ Total number of **students **are 1,600.