Prob (first defective) = 4 / 20 = 1/5
Prob(2nd defective) = 3/19
Prob (3rd defective) = 2/18 = 1/9
Pron 4th defective) = 1/ 17
Prob ( all 4 defective) = 1/5 * 3/19 * 1/9 * 1/17 = 1 / 4845 answer
D.
a.
b.
hope that helped
Answer:
32.36 or 809/25
Step-by-step explanation:
Use a scientific calculator
-9 to the second power will most likely be 81. A negative x a negative equals a positive. Hope this helped.
X+y = 59
x-y = 17
x= 38 and y = 21