00:01
Let's solve the given question.
00:02
So according to the question we have given q is equals to 13 % then it is equals to 0 .13.
00:09
Then p is equals to 1 minus q then it is equals to 1 minus 0 .13 is equal to 0 .87.
00:17
Now moving to part a of the question then probability of her first miss comes on 4th arrow.
00:34
Then it is equal to probability of first three are success then a failure then it is equal to p cube then it is equal to 0 .87 whole cube multiplied by 0 .13 then it is equal to 0 .0856 now moving to part b of this question then probability of she miss the birds i at least once then it is equal to one minus probability of no miss then it is equals to one minus probability of all success then it is equal to one minus p power nine then it is equal to one minus eight seven power nine then it is equal to 0 .7145.
01:46
Now, moving to part c of this question.
01:50
Then probability of her first miss comes on second or third arrow.
02:07
Then it is equal to probability of her first miss comes on second or third arrow.
02:20
Probability of it comes on third.
02:27
Then it is equal to pq plus p square q.
02:33
Then on putting the value we get 0 .87, multiply by 0 .13 plus 0 .87 whole square multiply by 0 .13.
02:45
Then it is equal to 0 .215...