2871: In a class there are 18 boys who are over 160 cm tall. If these boys constitute three-fourths of the boys and the total number of boys is two-third of the number of students in the class, then what is the number of girls in the class?
(a) 6
(b) 12
(c) 18
(d) 24
2872: The Chinese traveler Yuan Chwang (Hiuen Tsang) who visited India recorded the general conditions and culture of India at that time. In this context, which of the following statements is/are correct?
1. The roads and river-routes were completely immune from robbery.
2. As regards punishment for offences, ordeals by fire, water and poison were the instruments for determining the innocence or guilt of a person.
3. The tradesmen had to pay duties at ferries and barrier stations.
Select the correct answer using the codes given below.
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
2873: Match List I with List II and select the correct answer using the codes given below the Lists :
List I List II
(Important Day) (Date)
I. World Environment Day (A) March 20
II. World Forestry Day (B) June 5
III. World Habitat Day (C) September 16
IV. World Ozone Day (D) October 3
(E) December 10
Codes:
(a) I-B, II-A, III-D, IV-E
(b) I-A, II-B, III-D, IV-C
(c) I-A, II-B, III-C, IV-D
(d) I-B, II-A, III-D, IV-C
2874: If the price of a television set is increased by 25%. then by what percentage should the new price be reduced to bring the price back to the original level ?
(a) 15%
(b) 25%
(c) 20%
(d) 30%
2875: In a remote Indian village with a scarcity of fuel, the people draw water from a well. They should be advised before drinking that water to:
(a) Boil it
(b) Use ion exchange resins
(c) Use solar stills for distilling
(d) Use potassium permanganate for purifying the water