Question

A box contains $32$ coloured marbles. $8$ of them are red marbles and the rest are either blue or green marbles. A marble is drawn at random. Calculate the probability of drawing a marble which is not red in colour.

• A. $\frac{2}{3}$
• B. $\frac{5}{8}$
• C. $\frac{3}{4}$
• D. $\frac{7}{16}$

Answer 1

Answer: (C)

$\frac{3}{4}$

The marbles not in red color are $32-8=24$

Then probability of not drawing red marbles is,

$P\left(E\right)=\frac{24}{32}=\frac{3}{4}$