1
GATE CSE 2004
+2
-0.6
An examination paper has 150 multiple-choice questions of one mark each, with each question having four choices. Each incorrect answer fetches-0.25 mark. Suppose 1000 students choose all their answers randomly with uniform probability. The sum total of the expected marks obtained all these students is
A
0
B
2550
C
7525
D
9375
2
GATE CSE 2004
+2
-0.6
Two n bit binary stings, S1 and, are chosen randomly with uniform probability. The probability that the Hamming distance between these strings (the number of bit positions where the two strings different) is equal to d is
A
$$^n{C_d}/{2^n}$$
B
$$^n{C_d}/{2^d}$$
C
$$d/{2^n}$$
D
$$1/{2^d}$$
3
GATE CSE 2002
+2
-0.6
Four fair coins are tossed simultaneously. The probability that at least one head and one tail turn up is
A
1/16
B
1/8
C
7/8
D
15/16
4
GATE CSE 2001
+2
-0.6
Seven (distinct) car accidents occurred in a week. What is the probability that they all occurred on the same day ?
A
$$1/{7^7}$$
B
$$1/{7^6}$$
C
$$1/{2^7}$$
D
$$7/{2^7}$$
GATE CSE Subjects
EXAM MAP
Medical
NEET