1-If it takes an average of 12 minutes to back a dozen cookies, what is the probability that it will take at least 14 minutes to back a dozen cookies?

0.745

0.834

0.667

0.857

2-The average time it takes to run a mile is 9.22 minutes. If the variance is known ²= 5.33 minutes, what is the probability that is will take between 4.97 and 13.47 minutes to run?

29.51%

31.55%

8.45%

70.49%