There are some coloured pins in a bag. The pins can be green, yellow, purple, or grey. A pin is going to be taken at random from the bag. The table shows the probabilities of picking a purple or grey pin. The probability of picking a green pin is three times the probability of picking a yellow one.
a)Complete the table.
There are 14 purple pins in the bag.
b)Work out how many green pins are in the bag.