The copy shop has made 20 copies of a document for you. since the defective rate is 0.1, you think there may be some defective copies in your order, so you leaf through the first ten (which are a randomly chosen subset).

if there are 2 defective copies among the 20, what is the probability that you will encounter neither of the defective copies among the 10 you examine?

x = number of copies with a defect

a. x ~ binomial

b. x ~ negative binomial

c. x ~ hypergeometric

d. x ~ poisson

⊂⊃⊂⊃ω

step-by-step explanation:

i hope this : )

i think its a and d

step-by-step explanation:

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.