Question

There are 3 white marbles and 7 blue marbles in a bag.Jamie will randomly pick two marbles out of the bag without replacing the first marble chosen. What is the probability of jamie' s picking 2 white marbles?

A. 1/15
B.1/18
C.1/20
D.1/7
PLEASE HELP

Answer 1

Answer: A.
`(1)/(15)`

Explanation:

Given: The number of white marbles = 3

Total number of marbles =3+7=10

Since, Jamie will randomly pick two marbles out of the bag without replacing the first marble chosen.

The probability of Jamie' s picking 2 white marbles is given by :-

`\text{P(2 white)}=(3)/(10)*(2)/(9)=(1)/(15)`

Hence, the probability of Jamie' s picking 2 white marbles =
`(1)/(15)`