Question

A sack contains 20 marbles. The probability of drawing a green marble is 2/5. How many green marbles are in the sack?

Answer 1

Answer:

there are 8 green marbles

Step-by-step explanation:

probability = no. of green marbles/ total no. of marbles

So, 2/5 = no.of green marbles / 20

no. of green marbles = 2*20/5 = 8

Answer 2

Let green marbles = x

P(G mar.) = 2/5

So, x / 20 = 2/5

X = 2*20/5

X =8

Thus 8 green marbles