For the following questions answer them individually
The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called:
$$\frac{\sin 30^\circ}{1 + \cos 30^\circ} + \frac{1 + \cos 30^\circ}{\sin 30^\circ} = ?$$
The rate of discount on an article whose marked price is ₹ 170 and selling price is ₹ 130 is:
X attempts 94 questions and gets 141 marks. If for every correct answer 4 marks is given, and for every wrong answer 1 mark is deducted, then the number of questions wrongly answered by X is
