Find the number of pairs of red socks and green socks.

Q. There are 100 red, 80 green, 60 blue and 40 black socks in a box. If a person cannot see which colour he picks and places outside, what is the least number of socks to be taken out to ensure 10 pairs of socks?

Q. There are 3 red socks, 4 green socks and 3 blue socks, you choose 2 socks. The probability that they are of the same colour is

Q. Reddy has two pairs of black shoes and three pairs of brown shoes. He also has three pairs of red socks, four pairs of brown socks and six pairs of black socks. If Reddy chooses a pair of shoes at random and a pair of socks at random, Using Tree Diagram find the probability that he chooses shoes and socks of the same colour?

Q. John ordered $4$ pairs of black socks and some additional pairs of blue socks. The price of the black socks per pair was twice of the blue. When the order was filled, it was found that the number of pairs of the two colours had been interchanged. This increased the bill by $50$%. The ratio of the number of pairs of black socks to the number of pairs of blue socks in the original order was

Q. Hussain has $5red$, $3blue$ and $2green$ socks. If a sock is drawn at random, what is the probability that the sock is:

1. $P\left(Red\right)=\frac{1}{2}$
   $P\left(Blue\right)=\frac{1}{10}$
   $P\left(Green\right)=\frac{1}{5}$
2. $P\left(Red\right)=\frac{1}{2}$
   $P\left(Blue\right)=\frac{1}{5}$
   $P\left(Green\right)=\frac{1}{10}$
3. $P\left(Red\right)=\frac{1}{2}$
   $P\left(Blue\right)=\frac{3}{10}$
   $P\left(Green\right)=\frac{1}{5}$