A bag contains 4 red and 6 black balls. A ball is taken out of the bag at random. What is the probability of getting a black ball?

Question:

A bag contains 4 red and 6 black balls. A ball is taken out of the bag at random. What is the probability of getting a black ball?

(a) $\frac{2}{5}$

(b) $\frac{3}{5}$

(C) $\frac{1}{10}$

(d) none of these

 

Solution:

(b) $\frac{3}{5}$

Explanation:
Total possible outcomes = Total number of balls  = ( 4 + 6) = 10  
Number of black balls = 6

$\therefore P($ getting a black ball $)=\frac{6}{10}=\frac{3}{5}$

 

 

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