**1. ANSWER : C**

** Explanation - ** Number of students who passed half-yearly exams in the school

= (Number of students passed in half-yearly but failed in annual exams) + (Number of students passed in both exams)

= (6 + 17 + 9 + 15) + (64 + 55 + 46 + 76)

= 288.

Also, Number of students who passed annual exams in the school

= (Number of students failed in half-yearly but passed in annual exams) + (Number of students passed in both exams)

= (14 + 12 + 8 + 13) + (64 + 55 + 46 + 76)

= 288.

Since, the number of students passed in half-yearly = the number of students passed in annual exams. Therefore, it can be inferred that both the examinations had almost the same difficulty level.

Thus Statements (a), (b) and (d) are false and Statement (c) is true.

**2. ANSWER : D**

**Explanation - **Since the classification of the students on the basis of their results and sections form independent groups, so the total number of students in the class:

= (28 + 23 + 17 + 27 + 14 + 12 + 8 + 13 + 6 + 17 + 9 + 15 + 64 + 55 + 46 + 76)

= 430.

**3. ANSWER : D**

**Explanation****- **Pass percentages in at least one of the two examinations for different sections are:

For Section A = $\frac{14+6+64}{28+14+6+64}\times 100=\frac{84}{112}\times 100$% = 75%

For Section B =$\frac{12+17+55}{23+12+17+55}\times 100$ % = 78.5%

For Section C = $\frac{8+9+46}{17+8+9+46}\times 100$%= 78.75%

For Section D = $\frac{13+15+76}{27+13+15+76}\times 100$%= 79.39%

Clearly ,the pass percentage is maximum for Section D

**4. ANSWER : A**

**Explanation - **Total number of students passed in annual exams in a section

= [ (No. of students failed in half-yearly but passed in annual exams) + (No. of students passed in both exams) ] in that section

Success rate in annual exams in Section A= $\frac{14+64}{112}\times 100$% = 69.64%

Similarly, success rate in annual exams in:

Section B = $\frac{12+55}{107}\times 100$% = 62.62%

Section C = $\frac{8+46}{80}\times 100$% = 67.5%

Section D = $\frac{89}{131}\times 100$% = 67.94%

Clearly, the success rate in annual examination is maximum for Section A.

**5. ANSWER : D**

**Explanation - **Total number of failures in half-yearly exams in a section

= [ (Number of students failed in both exams) + (Number of students failed in half-yearly but passed in Annual exams) ] in that section

Failure rate in half-yearly exams in Section A %= 37.5 %

Similarly, failure rate in half-yearly exams in:

Section B = 32.71%

Section C = 31.25%

Section D = 30.53%

Clearly, the failure rate is minimum for Section D.

= (Number of students passed in half-yearly but failed in annual exams) + (Number of students passed in both exams)

= (6 + 17 + 9 + 15) + (64 + 55 + 46 + 76)

= 288.

Also, Number of students who passed annual exams in the school

= (Number of students failed in half-yearly but passed in annual exams) + (Number of students passed in both exams)

= (14 + 12 + 8 + 13) + (64 + 55 + 46 + 76)

= 288.

Since, the number of students passed in half-yearly = the number of students passed in annual exams. Therefore, it can be inferred that both the examinations had almost the same difficulty level.

Thus Statements (a), (b) and (d) are false and Statement (c) is true.

Exam Prep: CAT , Bank Exams , AIEEE

Job Role: Bank PO , Bank Clerk , Analyst

A) 27.53 percent | B) 34.78 percent |

C) 20.28 percent | D) 42.03 percent |

A) 1890 calories | B) 1840 calories |

C) 1790 calories | D) 1740 calories |

A) 13.89 | B) 21.74 |

C) 35.71 | D) 27.78 |

A) 45000 shares | B) 30000 shares |

C) 60000 shares | D) 15000 shares |

A) 632.5 | B) 603.75 |

C) 661.25 | D) 575 |

A) 62,000 | B) 64,000 |

C) 66,000 | D) 68,000 |

Explanation:

A) 12,000 | B) 13,000 |

C) 14,000 | D) 15,000 |

Explanation: