Question

A box contains 27 marbles some are blue and others are green. If a marble is drawn at random from the box, the probability that it is blue is 1/3. Then how many number of green marbles in the box

Answer 1

Answer:

Step-by-step explanation:

Total 27 marbles in the box;

If we select randomly and get blue marble with the probability of 1/3;

Probability= Expected outcome/Total outcome s,

Now equating the denominator 1/3=9/27;

9/27 is the probability to select a blue marble. So 27-9=18 green marbles in the box