Question

Ryan has 7 black pairs of socks, 3 pair of brown socks, and 8 white pairs of socks in his wardrobe. He randomly picks one pair. Find P(NOT Black) in fraction form

Answer 1

Step-by-step explanation:

solution given:

total pair of socks[S]=(7+3+8)=18

total pair of black socks[B]=7

total pair of brown socks [C]=3

total pair of white socks[W]=8

total no of orange marbles[O]=2

now

the P( not black) =?

we have

P( not black) =1-$\frac{n[B]}{n[S]}$

P( not black) =1-$\frac{7}{18}$

P( not black) =$\frac{18-7}{18}$

P( not black) =$\frac{11}{18}$

so 11/18 is a required probabilty.

Answer 2

Answer:

Black socks pairs = 7

Brown socks pairs = 3

White socks pairs = 8

P(not black) = ?

First, you need to add the brown & white socks pairs,

$3 + 8 = 11$

Then you need to add the total number of socks pairs,

$7 + 3 + 8 \\ = 7 + 11 \\ = 18$

P(not black)

$= \frac{11}{18}$