About 85% of students at a local high school favor school-sponsored extracurricular activities. If 20 randomly selected students are asked whether they support school-sponsored extracurricular activities, what is the probability that 19 will say “yes?”

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3

0 and 5 minutes

step-by-step explanation:

given that one morning eight buses arrive late by the number of minutes given below:

0 8 2 6 9 2 0 7 8

write these in ascending order

0   0 2 6 7 8 8 9

in the afternoon two more buses arrive at the bus stop say by x and y minutes late.

total number of buses = 10

median = average of 4th and 5th after arranging in ascending order

since 4th entry is 6, the values of x and y should be below 6

also given 0 is the mode so either x or y or both should be 0 because then only 0 gets the maximum frequency and hence mode

thus we have

0 0 0 2 6 7 8 8 9 and another unknown entry which is below 6.

since median is 3.5, we have the unknown entry to be 5 only because then only median =( 2+5)/2

thus the after noon buses were late by 0 and 5 minutes.