A) 70 | B) 76 |

C) 75 | D) 80 |

Explanation:

For an income of Rs. 8, investment = Rs. 100.

For an income of Rs. 6, investment = $Rs.\left(\frac{100}{8}*6\right)$= Rs. 75.

Market value of Rs. 100 stock = Rs. 75.

A) Both are equally good | B) 9 3/4% stock at 117 |

C) Cannot be compared, as the total amount of investment is not given | D) 11% stock at 143 |

Explanation:

Let investment in each case be Rs. (143 x 117).

Income in 1st case = Rs.$\frac{11}{143}$ x 143 x 117 = Rs. 1287.

Income in 2nd case = Rs.$\frac{39}{4\times 117}$ x 143 x 117= Rs. 1394.25

Clearly, 9 3/4% stock at 117 is better.

A) Rs. 145 | B) Rs. 245.1 |

C) Rs. 96 | D) Rs. 75 |

Explanation:

Michel earns Rs. 135 by investing Rs. 1620

To earn Rs. 8 how much he have to invest...?

= (8 x 1620)/135 = Rs. 96

A) Rs. 34000 | B) Rs. 31245 |

C) Rs. 24315 | D) Rs. 28000 |

Explanation:

Let the monthly salary of Shankar be = Rs.x

Amount invested on expenditure = 25% = x/4;

Remaning amount = 3x/4;

Amount invested on children education = 20% i.e = 3x/20;

Remaining amount = 3x/4 - 3x/20 = 3x/5;

Remaining amount invested in three different schemes i.e is 1/3(3x/5)

=> x/5 = 5600

Therefore x = 28000

Hence, Monthly salary of Shankar is Rs. 28,000.

A) 123 | B) 106 |

C) 100 | D) 156 |

A) 4000 | B) 4200 |

C) 4002 | D) 4020 |

Explanation:

S.P of Rs. 5000 stock = $Rs.\left(\frac{156}{100}*5000\right)$= Rs. 7800.

Income from this stock = $Rs.\left(\frac{12}{100}*5000\right)$ = Rs. 600.

Let investment in 8 % stock be x and that in 9 % stock = (7800 - x).

Therefore,

$\left(x*\frac{8}{90}\right)+\left(7800-x\right)*\frac{9}{108}=\left[600+70\right]$

$\frac{4x}{45}+\frac{7800-x}{12}=670\iff x=3600$

Therefore, Money invested in 8 % stock at 90 = Rs. 3600.

Money invested in 9 % at 108 = Rs. (7800-3600) = Rs. 4200.

A) 22.50 | B) 22 |

C) 20.45 | D) 12.50 |

Explanation:

Suppose he buys each share for Rs. x.

Then, $Rs.\left(25*\frac{9}{100}\right)=\left(x*\frac{10}{10}\right)$ or x = Rs. 22.50.

Cost of each share = Rs. 22.50.

A) 912 | B) 921 |

C) 920 | D) 900 |

Explanation:

Cost of 1 share =$Rs.\left[\left(10-\frac{3}{4}\right)+\frac{1}{4}\right]=Rs\frac{19}{2}$

Cost of 96 shares = $Rs.\left(\frac{19}{2}*96\right)$ = Rs. 912.

A) 250 | B) 1500 |

C) 500 | D) 50 |

Explanation:

By investing Rs. 136, income obtained = Rs. 10.

By investing Rs. 6800, income obtained = $Rs.\frac{10}{36}\times 6800$ = Rs. 500.