In a doctors waiting room 12 people are waiting to be seen; 7 claiming to have just a cold, 3 claiming to have a fever and a cold, and 2 claiming to have just a fever. What is the probability a person waiting to be seen claims to have a cold or a fever? 1. 0.17
2.0.25
3.0.37
4.0.50

Please explain how you got this answer ! Thank you !!

2. ^^ have a good day

Step-by-step explanation:

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)