Given a bag of 4 red marbles, 5 blue marbles and 6 green marbles, find the probability of drawing a blue marble and then drawing another blue marble without replacing the first
one.

Please help me!!!

Step-by-step explanation:

Probability of drawing a blue marble

= Number of blue Marble/ Total number of marble

= 5 / 4 + 5 + 6

= 5 / 15

= 1/3

Probability of taking another blue marble without replacing the first one

= Number of blue marble - 1 / Total number of marble - 1

= 5 - 1 / 15 - 1

= 4 / 14

= 2/7

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.