3661: In a wooden box there are 3 red and 4 black balls. If two balls are taken out Simultaneously (without looking at them), then the probability of both the balls being red is
(a) Zero
(b) 1/7
(c) 2/7
(d) 3/7
3662: A grocer bought 10 kg of apples for Rs. 81 out of which one kg was found rotten. If he wishes to make a profit of 10%, at what rate per kg. he should sell it?
(a) Rs. 9.00
(b) Rs. 9.90
(c) Rs. 10.10
(d) Rs. 10.20
3663: Which one of the following Articles of the Indian Constitution provides that "It shall be the duty of the Union to protect every State against external aggression and internal disturbance"?
(a) Article 215
(b) Article 275
(c) Article 325
(d) Article 355
3664: Photo chemical smog is a resultant of the reaction among.
(a) NO2, O3 and peroxyacetyl nitrate in the presence of sunlight
(b) CO, O2 and peroxyacetyl nitrate in the presence of sunlight
(c) CO, CO2 and NO2 at low temperature
(d) High concentration of NO2, O3 and CO in the evening
3665: Match List I with List II and select the correct answer by using the codes given below the lists :
List I List II
(Special Characteristic) (Name of Planet)
I. Farthest planet from the sun ------------ (A) Mercury
II. Largest planet of the solar system ---- (B) Venus
III. Planet second from the Sun in the solar system ------------ (C) Jupiter
IV. Planet nearest to the Sun -------------- (D) Pluto
------------------------------------- (E) Saturn
Codes:
(a) I-B, II-C, III-E, IV-A
(b) I-C, II-E, III-A, IV-B
(c) I-D, II-A, III-B, IV-C
(d) I-D, II-C, III-B, IV-A