Vivek is very intrested of collecting balls of different colours. He has a total of \(40\) balls in his basket out of which ten balls are red in colour and twelve are white. Out of the remaining balls, some are green in colour and the rest are pink.
Based on the above information, solve the following questions:
1. If the probability of drawing a pink ball is twice the probabilty of drawing a green ball, then find the number of pink balls.
2. Find the probability of drawing a ball of colour other than green colour.
3. Find the probability of drawing either green or red ball.
4. What is the probability that the drawn ball is neither pink nor a white ball?