A jeweller has arranged his gems based on the cut and colour of the gem:
Cuts - triangular , rectangular , and octagonal
Colours - amethysts , emeralds , and rubies
How many of the gems are rubies?
How many of the gems are triangular?
How many of the gems are both rubies and triangular?
A group of students were asked why they skipped breakfast. The two reasons given were that they were "not hungry" and they were "too busy".
A jeweller has arranged his gems based on the cut and colour of the gem:
Cuts - triangular , rectangular , and octagonal
Colours - amethysts , emeralds , and rubies
A student creates the following diagram of their favourite animals.