Question

a box contains socks of two colours black and white I have picked out a white Sox I pick out what work more with my eyes closed but is probability that I will make a pair



​

Answer 1

Answer:

this is just expalin with example

u do with wt refers to question

Ways to pick any 2 socks from 24 socks = 24C2

Ways to pick 2 BLACK socks from 12 BLACK socks = 12C2

Probability of picking 2 BLACK socks (P1)= 12C2 / 24C2 = 66/276

Probability of picking 2 WHITE socks (P2)= 12C2 / 24C2 = 66/276

Probability of picking any 2 same color socks = P1+P2 = 66/276 + 66/276 = 11/23

Answer 2

Given:

• Number of socks in the box = 4

To Find:

• Probability that it will make a pair

.

Solution:

Let B and W denote black and white socks respectively.

Then, we have,

S = {B, B, W, W}

If a white sock is picked out, then,

Total no. of socks left in the box = 3

Number of white socks left = 2 – 1 = 1

Probability of getting white socks =

$\sf\frac{Number\: of\: white\: socks\: left\: in\: the\: box}{ Total\: number\: of\: socks\: left\: in\: the\: box}$=$\boxed{\underline{\underline{\frac{1}{3} }}}$