# Numerical Ability [GATE (Graduate Aptitude Test in Engineering) Aptitude]: Questions 63 - 67 of 103

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## Question 63

Appeared in Year: *2021*

### Question

MCQ▾Let X be a continuous random variable denoting the temperature measured. The range of temperature is degree Celsius and let the probability density function X be for . Then mean of X is ________.

### Choices

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

a. | 2.5 | |

b. | 50.0 | |

c. | 25.0 | |

d. | 5.0 |

## Question 64

Appeared in Year: *2017*

### Question

MCQ▾The number of roots of in the range is

### Choices

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

a. | 2 | |

b. | 3 | |

c. | 0 | |

d. | 1 |

## Question 65

Appeared in Year: *2017*

### Question

MCQ▾X is a 30-digit number starting with the digit 4 followed by the digit 7. Then the number will have

### Choices

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

a. | 90 digits | |

b. | 91 digits | |

c. | 92 digits | |

d. | 93 digits |

## Question 66

Appeared in Year: *2021*

### Question

MCQ▾Which one of the following numbers is exactly divisible by ?

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 67

Appeared in Year: *2021*

### Question

MCQ▾The number of students passing or failing in an exam for a particular subject is presented in the bar chart above. Students who pass the exam cannot appear for the exam again. Students who fail the exam in the first attempt must appear for the exam in the following year. Students always pass the exam in their second attempt. The number of students who took the exam for the first time in the year 2 and the year 3 respectively, are ________.

### Choices

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

a. | 55 and 53 | |

b. | 65 and 53 | |

c. | 55 and 48 | |

d. | 60 and 50 |