Kate noticed that many of her colleagues were taking their annual leave over the summer months, whereas she preferred to take holiday during winter.
Kate asked her department to let her know their favourite season.
16 did not choose summer
14 did not choose autumn
15 did not choose winter
12 did not choose spring
How many people did Kate ask?
Answer:
Let x people be asked.
Then x – 16 chose Summer
x – 14 chose Autumn
x – 15 chose Winter
and x – 12 chose Spring
Adding gives:
4x – 57 = x (The total)
3x = 57
x = 19