a package contains 9 resistors, 3 of which are defective. if 4 are selected, find the probability
of getting the following results.
enter your answers as fractions or as decimals rounded to 3 decimal places.
part 1 out of 3
o defective resistors
p (0 defective) =

r and t.

both are 64 degrees.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional