Actual average salary of 12 officers = 400

Total salary of 12 officers = 400 x 12 = 4800

Average of these 12 officers as a whole =60

Total salary of 12 officers as a whole = 60 x 12 = 720

The total salary of rest = 4800 - 720 = 4080

Difference in average of the rest of officers = 60 - 56 = 4

Rest of the officers =

Total number of employees = 1020 + 12 = 1032

A) 134 | B) 137 |

C) 139 | D) 141 |

Explanation:

A) Rs. 4680 | B) Rs. 4420 |

C) Rs. 4960 | D) Rs. 5480 |

Explanation:

Let the expenditure on the 95 students be 'x'

Then,

95x + 500 = 120(x – 5)

95x + 500 = 120x - 600

120x - 95x = 1100

25x = 1100

=> x = 44

Therefore, total expenditure of the hostel becomes

95 x 44 + 500 = 4680.

A) 20 | B) 35 |

C) 54 | D) 40 |

Explanation:

Numbers of students in section A = x

∴ Numbers of students in section B and C = (100 – x)

∴ x 70 + (100 – x) 87.5 = 84 100

=> 70x + 87.5 100 – 87.5x = 8400

=> 8750 – 17.5x = 8400

=> 17.5x = 8750 – 8400 => x = 20.

A) Rs. 8840 | B) Rs. 11,500 |

C) Rs. 12,800 | D) Rs. 9450 |

Explanation:

Manager's monthly salary

= Rs. (1900 x 25 - 1500 x 24) = Rs. 11,500

A) 34 | B) 36 |

C) 38 | D) 40 |

Explanation:

M + Tu + W + Th = 4 x 48 = 192

Tu + W + Th + F = 4 x 46 = 184

M = 42

Tu + W + Th = 192 - 42 = 150

F = 184 – 150 = 34