Correct Answer  Option 2 : 22
Total number of students

Number of students in Mathematics

Number of students in English

Number of students in Chemistry

Number of students in Computer

Number of students in Physics

300

45 (3/20) × 300

45

60 (45 + 15)

84 (60 + 24)

66 [300 – (45 + 45 + 60 + 84 )]

Number of male students in Physics coaching = 66 × (1/3)
⇒ 22
Number of female students in Physics coaching = 66 × (2/3)
⇒ 44
Required difference = 44 – 22
⇒ 22