8 action, 3 comedy, 5 drama....total = 16 dvd's
P(2 action, then a comedy)...without replacement
8/16 * 7/15 * 3/14 = (8 * 7 * 3) / (16 * 15 * 14) = 168/3360 = 1/20
good lesson and good day ^-^
Answer:
picture?
Step-by-step explanation:
The 70th percentile is the same as the cutoff recovery time

such that every point above this time falls in the longest 30%, i.e.

Transform to the standard normal distribution:

where

is the z-score corresponding to the cutoff time

, which is approximately

. Solve for

: