If P(A) denotes the probability of an event A, then
(A) P(A) < 0 (B) P(A) > 1 (C) 0 ≤ P(A) ≤ 1 (D) –1 ≤ P(A) ≤ 1
The probability expressed as a percentage of a particular occurrence can never be
(A) less than 100 (B) less than 0(C) greater than 1 (D) anything but a whole number
If the probability of an event is p, the probability of its complementary event will be
(A) p – 1 (B) p (C) 1 – p (D) 1-1/p
An event is very unlikely to happen. Its probability is closest to
(A) 0.0001 (B) 0.001 (C) 0.01 (D) 0.1
If an event cannot occur, then its probability is
(A) 1 (B) 3/4 (C) 1/2 (D)0
Consider the following distribution :
Marks obtained Number of students
More than or equal to 0 63
More than or equal to 10 58
More than or equal to 20 55
More than or equal to 30 51
More than or equal to 40 48
More than or equal to 50 42
the frequency of the class 30-40 is
(A) 3 (B) 4 (C) 48 (D) 51
The times, in seconds, taken by 150 atheletes to run a 110 m hurdle race are tabulated below :
The number of atheletes who completed the race in less then 14.6 seconds is :
(A) 11 (B) 71 (C) 82 (D) 130
Consider the data :
The difference of the upper limit of the median class and the lower limit of the modal class is
(A) 0 (B) 19 (C) 20 (D) 38
For the following distribution :
Marks Number of students
Below 10 3
Below 20 12
Below 30 27
Below 40 57
Below 50 75
Below 60 80
the modal class is
(A) 10-20 (B) 20-30 (C) 30-40 (D) 50-60
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