Question

The blood groups of 200 people is distributed as follows: 50 have type ablood, 65 have b blood type, 70 have o blood type and 15 have type ab blood. if aperson from this group is selected at random, what is the probability that this person has o blood type

Answer 1

Answer:

7/20

Step-by-step explanation:

n(s)=200

n(A)=70

p=?

p=n(A)/n(s)

p=70/200

p=7/20

Answer 2

Given:

Total number of people = 200

People with type A blood group = 50

People with type B blood group = 65

People with type O blood group = 70

People with type AB blood group = 15

To find:

The probability of choosing a person with type O blood group.

Solution:

The probability of an event to occur is the chance or likelihood of its occurrence.

Probability of an event = number of possible outcomes/ total count of the events

There is a total of 200 people.

So, the chance of selecting a person will be out of 200 people.

The number of possible outcomes for a person to be of blood group O is 70.

 

The probability that the selected individual has a blood group type O = 70/200

= 7/20

After selecting a person at random from a group of 200 people, the probability of choosing an individual of O-type blood group is 7/20.