Question

On a cold winter day in February, many students in Ms. Bush's sixth-grade class had runny noses and sore throats. After examining each student, the school nurse constructed the following table.


Sore Throat No Sore Throat
Runny Nose 7 14
No Runny Nose 6 6


Find the probability that a randomly selected student has a runny nose or a sore throa

Answer 1

SOLUTION :

Total students = 7 + 14 + 6 + 6 = 33

P(Runny nose or Sore throat)

= P(Runny nose) + P(sore throat) - P(Runny nose and Sore throat)

= 21/33 + 13/33 - 7/33

= 27/33 

= 9/11 (ANSWER).

Answer 2

a student earns 3 doller per hour baby sitting if she earned a total of 28.50 how many hours did she baby sit

Answer 3

you just divide 28.50 by 3 and the sum is the answer i am in fifth grade dude