how many ways to select a subset of eight dougnuts from three types of donuts if at most two doughnuts of the first type can be chosen

binomial distribution

median= 2

range = 7-0 = 7

how to find median?

no. of term=28

median=(28+1)/2=14.5th term

the 14th and 15th term are 2, therefore the median is (2+2)/2 = 2

nlgqer

step-by-step

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6