276: Ten Identical particles are moving randomly inside a closed box. What is the probability that at any given point of time all the ten particles will be lying in the same half of the box?
(A) 2/11
(B) 2/9
(C) 1/5
(D) 1/2
277: One local and another express train were proceeding in the same direction on parallel tracks at 29 km/hour and 65 km/hour respectively. The driver of the former noticed that it took exactly 16 seconds for the faster train to pass by him. What is the length of the faster train?
(a) 60 m
(b) 120 m
(c) 160 m
(d) 240 m
278: Gestation period of a goat is about:
(a) 150 days
(b) 200 days
(c) 250 days
(d) 365 days
279: Amniocentesis is a method for:
(a) Determination of foetal sex.
(b) Separation of amino acids.
(c) Determination of the sequence of amino acids in a protein.
(d) Inducing abortion.
280: Assertion (A):
Emperor Akbar marched towards Afghanistan in 1581 with a huge army.
Reason (R):
He was on his way to reclaim his ancestral country of Ferghana in Central Asia.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true