If the random variable X takes the values x1,x2,x3,....x10 with probabilities P(X = xi) = Ki then the value of K is equal to.
1/10
1/4
1/55
7/12
If P(A) = P(B) = P(C) = 1/4, P (AB) = P (CB) = 0 and P(AC) = 1/8, then P(A+B) is equal to
5/8
37/64
3/4
1/2
A dice is thrown 100 times, getting an even number is considered a success. The variance of the number of success is
10
25
18
The probability that in the toss of two dice, we obtain the sum 7 or 11, is
1/6
1/18
2/9
23/108
If A and B are mutually exclusive events with P(A) = 1/2 x P(B) and AυB = S, then P(A) is equal to
2/3
1/3
A complete cycle of a traffic light take 60s. During each cycle the light is green for 255, yellow for 5 s and red for 30s. At a randomly chosen time, the probability that the light will not be green, is
4/12
If P(A) = P(B) = x and P(A∩B) = P(A'∩B') = 1/3, then x is equal to
The probability that atleast one of A and B occurs is 0.6. If A and B occur simultaneously units probability 0.3, then P(A') + P(B') is
0.9
0.15
1.1
1.2
A coin and six faced die, both unbiased, are thrown simultaneously. The probability of getting a head on the coin and an odd number on the die, is
If 4 P(A) = 6 P(B) = 10 P (A∩B) = 1, then (B/A) is
3/5
7/10
19/60
2/5
