Answer:
18:10 is equivalent to 9:5
Step-by-step explanation:
half of 18 is 9 and half of 10 is 5
Do the opposite of what you did in reverse order.
so add 100 and divide by 2 in that order.
(80 + 100)/2
Your answer will be congruent
Answer: There are 24 patients who had allergies or ear infections but not both.
Step-by-step explanation:
Since we have given that
Number of patients having ear infections = 9
Number of patients having allergies = 15
We need to find the number of patients had allergies or ear infections, but not both.
According to Venn diagram , we get that
Number of patients had allergies or ear infections is given by

Hence, there are 24 patients who had allergies or ear infections but not both.