Question

In the sample of $50$ people, $21$ has type $"O"$ blood, $22$ has type $"A"$ blood, $5$ has type $"B"$ blood and $2$ has type $"AB"$ blood. If a person is selected at random find the probability that the person has type $"O"$ blood

• A. $\frac{21}{50}$
• B. $\frac{22}{50}$
• C. $\frac{2}{50}$
• D. None of these

Answer 1

Answer: (A)

$\frac{21}{50}$

P(${}^{\prime }{O}^{\prime }$ blood) $=\frac{PeopleHavin{g}^{\prime }{O}^{\prime }blood}{Total}$ $=\frac{21}{50}$