Resources

Resources

Find probabilities using the addition rule

In a study about a pandemic, data of

900

persons was collected. It was found that

190

persons had symptom of fever,

220

persons had symptom of cough,

220

persons had symptom of breathing problem,

330

persons had symptom of fever or cough or both,

350

persons had symptom of cough or breathing problem or both,

340

persons had symptom of fever or breathing problem or both,

30

persons had all three symptoms (fever, cough and breathing problem). If a person is chosen randomly from these

900

persons, then the probability that the person has at most one symptom is.

2

) On a shelf there are

60

20

poetry books. What is the probability that Person A chooses a novel and walks away with it and then Person B walks up shortly after and picks another novel?

The cost of a sleeping bag has been discounted by

\$ 22

, so that the sale price of the bag is

552

Find the onginat price of the sleeping bag. p, by solving the equation

p-22=52

\newline

The original price of the sleeping bag was

\$ \square

Jacci has a fair coin and a wooden cube. On the cube, there are two faces colored green, two faces colored blue, and two faces colored red. Mary flips the coin and tosses the cube. What is the probability of getting both a tail on the toss of the coin and a green face on the roll of the cube?