# Numerical Ability [GATE (Graduate Aptitude Test in Engineering) Aptitude]: Questions 30 - 34 of 103

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## Question 30

### Question

MCQ▾Which of the following assertions are CORRECT?

P: Adding to each entry in a list adds to the mean of the list

Q: Adding to each entry in a list adds to the standard deviation of the list

R: Doubling each entry in a list doubles the mean of the list

S: Doubling each entry in a list leaves the standard deviation of the list unchanged

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 31

Appeared in Year: *2015*

### Question

MCQ▾In the given figure angle is a right angle, , and . If area of triangle is , then the area of triangle in is ________.

### Choices

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

a. | 180 | |

b. | 250 | |

c. | 220 | |

d. | 280 |

## Question 32

Appeared in Year: *2013*

### Question

MCQ▾If then the values of is:

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 33

Appeared in Year: *2020*

### Question

MCQ▾A four-digit integer number from 1001 - 9999, the digit group ‘37’ (in the same sequence) appears ________ times.

### Choices

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

a. | 280 | |

b. | 299 | |

c. | 279 | |

d. | 270 |

## Question 34

Appeared in Year: *2013*

### Question

MCQ▾A firm is selling its product at per unit. The total cost of production is and firm is earning total profit of . Later, the total cost increased by . By what percentage the price should be increased to maintain the same profit level?

### Choices

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

a. | 5 | |

b. | 10 | |

c. | 15 | |

d. | 30 |