Correct Answer - Option 2 : 48

**Given:**

The number of girls who donated blood in department A = 40%

Total number of girls who donated blood in department A = 25% of the department

**Calculations:**

Department |
percentage of girls |
percentage of blood donating girls* |
number of blood donating Boys* |
percentage of blood donating boys |
number of blood donating girls |

A |
25% |
40% |
48 |
60% |
32 |

B |
40% |
50% |
75 |
50% |
75 |

C |
30% |
70% |
39 |
30% |
91 |

25% of girls = 32

100% of department = 32 × 100/25 = 128

Blood donated students in department A = 32 + 48 = 80

The number of boys who did not participate in the blood donation camp = total number of students - number of students who donated blood

⇒ 128 – 80 = 48

**∴ The number of boys in the department 'A' who did not participate in the blood donation camp is 48**