An ordinary cube has four blank faces.One face marked 2 and another marked 3.Then the probability of obtaining 12 in 5 throws is
None of these
In a Binomial distribution ,the probability of getting a success is 1/4 and standard deviation is 3 .Then its mean is
6
8
10
12
If the standard deviation of a binomial distribution (q+p) 16 is 2,then its mean is
2
4
16
If X is a random variable with the following distribution then K=____________.
1/8
1/4
1/6
1/2
An urn contains 7 green and 5 yellow halls.Two balls are drawn at a time.The probability that both balls are of the same colour is
1/33
5/33
7/22
31/66
A team of 4 Musicians is to be chosen at random out of 3 boys,2 girls and 4 children.The chance that exactly two of them will be children is
10/21
4/9
3/43
Probability of getting heads in all the three trials,when a balanced coin is tossed thrice,will be
1
A die is thrown 100 times .If getting an odd number is considered a success,the variance of the number of success is
50
25
100
The value of C for which P(X=K)=CK2 Can serve as the probability distribution function of a random variable x that total value 0,1,2,3,4 is
1/100
1/15
1/10
1/30
