676: A box contains 20 balls of which 8 are green, 7 are white and 5 are red. What is the minimum number of balls to be picked up without replacement to make sure that at least one ball of each colour is drawn?
(a) 11
(b) 13
(c) 14
(d) 16
677: The surface of the water in a lake is frozen and its temperature is -15°C. The maximum possible temperature of the water inside the lake in contact with the ice layer will be:
(a) 0°C
(b) 4°C
(c) 15°C
(d) Insufficient data to predict
678: In the context of which of the following do you sometimes find the terms 'amber box, blue box and green box' in the news?
(a) WTO affairs
(b) SAARC affairs
(c) UNFCCC affairs
(d) India-EU negotiations on FTA
679: In the context of Indian economy, 'Open Market Operations' refers to
(a) borrowing by scheduled banks from the RBI
(b) lending by commercial banks to industry and trade
(c) purchase and sale of government securities by the RBI
(d) None of the above
680: Seasonal migration of men and animals from lower to higher altitudes during the summer is known as
(a) Nomadism
(b) Migration
(c) Transhumance
(d) Pastoralism