Question

The blood types of $150$ people were determined for a study as shown in the figure below.
If $1$ person from this study is randomly selected, what is the probability that this person has either Type $A$ or Type $AB$ blood?

• A. $\frac{62}{150}$
• B. $\frac{66}{150}$
• C. $\frac{68}{150}$
• D. $\frac{73}{150}$
• E. $\frac{84}{150}$

Answer 1

The correct option is D $\frac{73}{150}$

Probability is a branch of mathematics that deals with calculating the likelihood of a given event's occurrence, which is expressed as a number between $1$ and $0$.

People with blood type $O=62$

People with blood type $A=67$

People with blood type $B=15$

People with blood type $AB=6$

Probability $=$ the number of occurrences of a targeted event divided by Total number of occurrences.

The probability that this person has either Type A or Type AB blood

$\Rightarrow$ (People with blood-type $A$ or $AB$) / (Total number of people)

$\Rightarrow \frac{(67+6)}{(62+67+15+6)}$

$\Rightarrow \frac{73}{150}$