Question

a box contains 9 red marble, 12 blue marbles, 13 green marbles and 6 white marbles. what is the probability of taking a red marble​

Answer 1

$\sf \Large Solution!!$

$\sf Probability=\dfrac{Favourable\:outcomes}{Number\:of\:outcomes}$

Number of outcomes = 9 + 12 + 13 + 6 = 40

Favourable outcomes = 9

$\sf Probability=\dfrac{9}{40}$