00:01
For this question, the probability was given here, which is 3 .2%.
00:04
I can denote by using the p here.
00:07
3 .2 % means this is 0 .032.
00:12
And the number of flights, which is the number of trial here, which is 8 ,429.
00:17
So i'm going to use the binormal distribution for this one, which is binomal distributed, 8 ,429, and the probability is 0 .032.
00:25
So in the first part of the question, we need to get the mean value here, which is equal to n times, 8429 times this is 0 .032 so this is 84 29 84 29 times which is 0 .032 so the value would be which is 269 points let's say this is 73 73 with two decimal places and the b so for this part we're going to use the normal approximation here so we need to get the mean value which is n times b so we got this value before and the standard division so the standard deviation has the formula which is the square root of n times p times 1 minus p here so this is 84 29 times 0 .032 n times which is 1 minus 0 .0 32 let me just get this standard deviation here which is the square root of this is 84 29 n times 0 .032 in times bracket this is 1 minus 0 .0 .0 32.
01:34
So the standard division was which is 16 point, let's say this is 16 here...