Question

in a bag I have 16 yellow marbles, 14 by marbles and 10 black marbles. If I draw to marbles, one at a time, what’s my probability of drawing a black marble, putting it back and then choosing a yellow marble

Answer 1

Answer:

1/10

Step-by-step explanation:

There are 16+ 14+10 = 40 marbles

P( black) = black/total = 10/40 = 1/4

We put it back

There are 16+ 14+10 = 40 marbles

P( yellow)  = yellow/ total = 16/40 = 2/5

Multiply the probabilities together

P( black, yellow) = 1/4 * 2/5

                           = 2/20 = 1/10