00:01
In this problem, we are given that x is a random variable which is having binomial distribution, and the number of trials of this distribution is represented with n, and the probability of this axis that's represented with the letter p.
00:15
And the mean of the distribution, that is given as 2, and the variance is equal to 3.
00:21
And we are required to find the probability that x is not less than 7.
00:25
So basically, we have to find the probability that x is greater than or equal to, so we see that if we use this formula, then this gives us the main of the binomial distribution.
00:38
And the main is already given as 2, so we will get n times p as 2.
00:42
Let's mark this as equation 1.
00:44
And if we use this formula, the variance which is n times p into q, this is equal to 3 that's given to us.
00:51
And q here is the probability of the failure...