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

Answer 1

A think

Answer 2

THE PROBABILITY THAT HE WILL PICK THE FIRST WHITE MARBLE IS 3 /10
SINCE THE MARBLE IS NOT REPLACED THE TOTAL NUMBER OF MARBES NOW IS 9 AND REMAINING ARE 2 WHITE MARBLES
PROBABILITY OF PICKING THE SECOND WHITE MARBLE = 2/9

so PROBABILITY OF PICKING TWO WHITE MARBLES = 3/10* 2/9
= 1/15

Answer 3

A