Quantity A |
Quantity B |

No. of male attendees who wore mask | 800 |

- A. Quantity A is greater.
- B. Quantity B is greater.
- C. The two quantities are equal.
- D. The relationship cannot be determined from the information given.

**Answer: B **

**Explanation:**

Given that the total attendees are 4000.

No. of attendees wore a mask = 40% of 4000 = 1600, So 2400 people didn’t wear the mask.

No. of males = 70% of 4000 = 2800

So, no. of females = 1200

For 2 sets question, use table method,

Given,

Mask | No Mask | Total | |

Male | ? | 2800 | |

Female | 10% of 1200 = 120 | 1200 | |

Total | 1600 | 2400 | 4000 |

From the table, we can find

Mask | No Mask | Total | |

Male | 520 | 2280 | 2800 |

Female | 1080 | 10% of 1200 = 120 | 1200 |

Total | 1600 | 2400 | 4000 |

So, No. of men who wore mask = 520

Quantity B is greater than Quantity A.

**Hence the answer is B.**