Combinations/Permutations help pls aaa A box contains 27 calculators, 5 of which are defective. 5 calculators are selected at random from the box.

Write your answers as a simplified fraction.

A) What is the probability that all of the selected calculators are defective?

The probability that all of the selected calculators are defective is ___

.

B) What is the probability that none of the selected calculators are defective?

The probability that none of the selected calculators are defective is ___

.

///I normally don't have lots of trouble and honestly I don't have a big problem with the first half of this question at all. I know it's 1/(27 C 5) right? It's just this second part.. I'm so stuck.

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.

step-by-step explanation:

ok one would be money, and the other would be refreshments or something similar. if each bag of popcorn is 5.00 and each drink is half of that that means drinks are 2.50 the proper way to do that would to look and see how much of each you can buy without exceeding a limit of 30.00

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.