Maria had 28 dreams last month. If 16 of them involved monkeys, 15 involved squirrels, and 4 involved no animals, then at least how many dreams involved both monkeys and squirrels?
1 Answer
Apr 22, 2016
7
Explanation:
Total of dreams: 28
Dreams with no animals: 4
So:
Monkey involved dreams: 16
Squirrels involved dreams: 15
Now, the question is: at least how many dreams involved both monkey and squirrels?
Since we have the total of dreams which involved animals 24; monkey dreams 16, and squirrel dreams 15, which makes 31 in total, we can see that out of 24 dreams 31 included animals (monkey and/or squirrels).
From this, it can be concluded that 24 dreams were used up for monkey or squirrels, but the rest of them were used up for both monkeys and squirrels.
Mathematically:
7 dreams included both monkeys and squirrels.
