Question

a group of people were surveyed, and the data about their age and whether they have an iron deficiency was recorded in the two - way frequency table.

iron deficiency	age
yes	41	37	24	102
no	100	43	40	183
total	141	80	64	285

based on the data in the table, the probability of randomly choosing a person who has iron deficiency and is less than 20 years old is
the probability of randomly choosing a person who does not have iron deficiency and is 20 years old or more is

Explanation:

Step1: Probability formula

$P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$

Step2: First - probability

Favorable for first is 41, total is 300.

Step3: Second - probability

Favorable for second is $43 + 40=83$, total is 300.

Answer:

1. $\frac{41}{300}\approx0.14$
2. $\frac{43 + 40}{300}=\frac{83}{300}\approx0.27$