Question

A ball is drawn at random random from a box containing $4$ red balls and $7$ white balls, what is the probability that the ball drawn is red?

• A. $\frac{1}{2}$
• B. $\frac{4}{11}$
• C. $\frac{7}{11}$
• D. None

Answer 1

Answer: (B)

$\frac{4}{11}$

Total number of possible outcomes$=4+7=11$

The number of favorable outcomes(the ball drawn is red)=4

$\Rightarrow$The probability of drawing a red ball=$=\frac{no.fofavorableoutcomes}{Totalno.ofoutcomes}=\frac{4}{11}$