Case sportalkers- probabilities

"Probability is the possibility that exists between several possibilities, that an event or condition will occur."
Source

Case:

87 Sportalkers practice sports as shown in the table below:

Group	Football	Basketball	Tennis	Swimming
1	4	6	4	10
2	8	6	3	7
3	5	4	2	10
4	3	4	1	10
sum	20	20	10	37

It's known that:

• None sporstalker practices more than one sport
• Half the members in each sport are men.

If we choose one of the sportalkers at random, ¿What is the probability of choosing a woman who plays basketball?

Solution:

P(BW) = BW/ 2 =10 /N

P(Bw)= 10/87 = 11.49%

Answer:

The probability of choosing at randomly a woman who plays basketball among the 87 sportalkers is 11.49%.

Case and image of my own elaboration.
Resources : Phirx application