471: There are 20 students with an average height of 105 cms in a class. Then 10 students with an average height of 120 cms join the class. What will be the average height of the class now?
(a) 100 cms
(b) 110 cms
(c) 120 cms
(d) 130 cms
472: Which are the materials generally employed as solder in soldering operation in elections.
(a) Iron and tin
(b) Lead and tin
(c) Aluminum and lead
(d) Aluminum and iron
473: Consider the following statements:
The price of any currency in international market is decided by the
1. World Bank
2. demand for goods/services provided by the country concerned
3. stability of the government of the concerned country
4. economic potential of the country in question
Which of the statements given above are correct?
(a) 1, 2, 3 and 4
(b) 2 and 3 only
(c) 3 and 4 only
(d) 1 and 4 only
474: A goat is tied to two poles P and Q with ropes that are 15-metre long. P and Q are 20-metre apart as shown in the given diagram:
475: Where is Davos the venue of the annual meeting of World Economic Forum located?
(a) France
(b) Germany
(c) Switzerland
(d) Luxembourg