We have given the number of successes and the sample size for a simple random sample from a population. in each case, do the following tasks.(a) determine the sample proportion. (b)decide whether using the one-proportion z-interval procedure is appropriate.(c) if appropriate, use the one-proportion z-interval procedure to find the confidence interval at the specified confidence level.x=40,n=50,95% level.x=3,n=100,99% level.

X=40 n=50 and it equals =100,99 percent level

Lori took  of the pictures with her camera.

That means the remaining pictures were taken with her cell phone.

(134 - 86 = 48, which means  of the pictures were taken with her cell phone.)

If  of the 48 pictures she took with her cell phone were blurry, that means the probability of Lori opening the computer folder and opening a random picture that is blurry and AND taken with her cell phone is 7%.

This is because ( × ) × 100 = 7.16%.

(Tip: the word 'and' in probability means 'multiplied by'. So if it's asking for the probability of a blurry picture () AND a picture taken with her cell phone (), you should multiply the two together.)