# NRA CGL (National Recruitment Agency-Combined Graduate Level) Mathematics: Questions 197 - 201 of 425

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## Question number: 197

### Question

A person buys certain number of marbles at 30 per rupee and equal number at 40 per rupee. He mixes them and sells them at 12 per rupee. His gain or loss in the transaction is (Paper - I)

### Choices

Choice (4) | Response | |
---|---|---|

a. | 24 % gain | |

b. | 47 % gain | |

c. | 40 % loss | |

d. | 20 % loss |

## Question number: 198

» Average

### Question

The average age of 50 students of a class is 12 years. When 10 new students are admitted, the average age is increased by 0.5 years. The average age of new students is (Paper- I)

### Choices

Choice (4) | Response | |
---|---|---|

a. | 11 years | |

b. | 15 years | |

c. | 12 years | |

d. | 14 years |

## Question number: 199

### Question

A and B together can do a piece of work in 9 days, B and C in 18 days, and A and C in 12 days. The number of days all of them working together take to complete the work is (Paper - I)

### Choices

Choice (4) | Response | |
---|---|---|

a. | 5 | |

b. | 8 | |

c. | 10 | |

d. | 19 |

## Question number: 200

» Interest

### Question

Rs. 500 was invested at 12 % per annum simple interest and a certain sum of money invested at 10 % per annum simple interest. If the sum of the interests on both the sums after 4 years is Rs. 480, the later sum of money is (Paper- I)

### Choices

Choice (4) | Response | |
---|---|---|

a. | Rs. 1200 | |

b. | Rs. 1400 | |

c. | Rs. 1100 | |

d. | Rs. 1300 |

## Question number: 201

### Question

Three numbers which are co-prime to one another are such that the product of the first two is 2773 and that of the last two is 4189. The sum of the three numbers is (Paper- I)

### Choices

Choice (4) | Response | |
---|---|---|

a. | 170 | |

b. | 177 | |

c. | 190 | |

d. | 193 |