Question

If a pebble is to be placed in the given pattern, then the probability of the pebble being placed on a green square is .

• A. $\frac{2}{3}$
• B. $\frac{1}{2}$
• C. $\frac{1}{10}$

Answer 1

The correct option is A $\frac{2}{3}$

The given pattern is


We observe:
Total number of squares = 25
Number of green squares = 10

We know,
$\text{Probability}=\frac{Numberoffavorableoutcomes}{Totalnumberofoutcomes}$

Putting values, we get:

$\text{Probability}=\frac{10}{25}$

$=\frac{2}{3}$

Hence, the required probability of the pebble to be placed on a green square $\text{is}\frac{2}{3}.$