Question

A jar contains marbles of blue,white and red colours.The probability of getting a blue marble is 4/15 and the probability of selecting a white marbles2/5.If the jar contains 10 red marbles.Find the no. of mables in the jar

Answer 1

30 marble are there in the jar

Answer 2

Answer:

Step-by-step explanation:

Assume that total no. of marbles are X . Given that no.of red marbles are 10 .

Also given the probability of blue marbles= 4/15

And probability of white marbles as =2/5

We know that probability is =1

So, 1-(4/15+2/5) =1/3

Now the probability of red marbles is know =1/3

1/3=10/x ( cross multiply)

X= 30marbles

Hope u understand...