[" 50.Find the total number of selections of at least one red ball from "4" red and "],[3" green balls if the balls of the same colour are different."]

Find the total number of selections of at least one red ball from 4 red balls and 3 green balls, if (a) the balls of the same colour are different, (b) the balls of the same colour are identical.

Find the total number of selections of at least one red ball from 4 red balls and 3green balls, if (a) the balls of the same colour are different, (b) the balls of the same colour are identical.

Find the total number of selections of at least one red ball from a bag containing 4 red balls and 5 black balls, balls of the same colour being identical.

Find the total number of selections of at least one red ball from a bag containing 4 red balls and 5 black balls, balls of the same colour being identical.

Find the total number of selections of at least one red ball from a bag containing 4 red balls and 5 black balls, balls of the same colour being identical.

Find the total number of selections of at least one red ball from a bag containing 4 red balls and 5 black balls, balls of the same colour being identical.

Find the total number of selections of at least one red ball from a bag containing 4 red balls and 5 black balls,balls of the same colour being identical.

Find the total number of combinations taking at least one green ball and one blue ball , from 5 different gree balls, 4 different blue ball and 3 different red balls .