00:01
Hi, i'm david and i'm here to help you answer your question.
00:03
Now let me pick up your question here.
00:05
In the question here, we are going to discuss about the binomial approximated to the normal.
00:10
Here, if in the x that follows by the binomial with the n and the b, and we have the mean equal to the n times b, standard division equal to n times b, times 1 minus b under the square root, and the x here can be approximately to the normal.
00:27
If we tend the x minus the mean of a standard deviation, we obtain the standard normal.
00:33
In the question here we have the x follows by the binomial.
00:37
When the n, it will equal to the 300.
00:41
And we're given the p equal to the 20 % of the children.
00:45
And we'll be the zubon 2.
00:47
And here we can approximate the x by the normal.
00:51
Where we have the mean, it will equal to n times p.
00:55
So with the 300 times when the zubon 2...