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RD Sharma Solutions Class 7 Mathematics Solutions for Data Handling-Probability Exercise 25.1 in Chapter 25 - Data Handling-Probability

Question 2 Data Handling-Probability Exercise 25.1

A box contains two pair of socks of two colours (black and white). I have picked out a white sock. I pick out one more with my eyes closed. What is the probability that I will make a pair?

Answer:

Given the number of socks in the box = 4

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 the total no. of socks left in the box = 3

Number of white socks left = 2 – 1 = 1

Probability of getting white socks = number of white socks left in the box/ total number of socks left in the box

= 1/3

Video transcript
"hey guys welcome to lido q a video i am vineeth your lido tutor bringing this question to you in the given figure l and m are two parallel lines intersected by another pair of parallel lines p and q so that triangle abc is equal to is congruent to triangle cda therefore from the figure we can say in triangle abc and triangle adc ac equal to ac common side right angle cad equal to angle a cb alternate angles and angle bac is equal to angle ac d again alternate angles therefore so this angle and this angle is equal this angle and this angle are equal right now in the triangle this side is included ac is included side between the equal angles right therefore by a s a congruency triangle abc is congruent to triangle cda isn't it guys right so that's that so if you have a dog please leave a comment below do like the video and subscribe to our channel i'll see you in our next video until then bye guys keep practicing"
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