(i). In a survey about colour liking it was determined that everyone surveyed liked at least one of the three colours (Red, Green and Blue). 30% liked red, 40% liked green and 50%

liked blue. 10% liked both red and green, 5% liked both green and blue, while 10% liked

both red and blue. Determine the proportion

a. That liked red only (

b. That liked blue only (

c. That liked green only (2

d. That liked all the colours​