MHT CET Maths Model Test 02 MHT - CET - MHT CET Maths Model Test 02

Let X – B (n = 7, p = 0.5). Then P(X = 2) is ______.

In order to get a head at least once probability ~ 0.9, the minimum number of time a unbiased coin needs to be tossed is ______.

The probability distribution of a random variable X is given below.

X = k	0	1	2	3	4
P(X = k)	0.1	0.4	0.3	0.2	0

The variance of X is ______

The rate of growth of bacteria is proportional to the number present. If initially, there are 1000 bacteria and the number doubles in 1 hour, the number of bacteria after `21/2` hours will be ______. `(sqrt(2) = 1.414)`