Question

The table below shows the number of marbles of different colors in a bag:

Marble Experiment

Color of
Marbles Number of
Marbles
Red
1
White
5
Black
10


Ursula draws a marble from the bag randomly without looking. She then draws another marble from the bag without replacing the first one. Which expression shows the probability of drawing black marbles in both the trials?
10 over 16 added to 9 over 16
10 over 16 added to 9 over 15
10 over 16 multiplied by 9 over 16
10 over 16 multiplied by 9 over 15

Answer 1

@knov

Answer 2

\[\large P(2\ black)=\frac{10C2}{16C2}\]

Answer 3

so its d?
10 over 16 multiplied by 9 over 15
@kropot72

Answer 4

@ILovePuppiesLol

Answer 5

@ILovePuppiesLol

Answer 6

i found it

Answer 7

@rebeccaxhawaii help

Answer 8

@ILovePuppiesLol pleaseee helppp meee

Answer 9

\[\large \frac{10C2}{16C2}=\frac{10!}{2!8!}\times\frac{2!14!}{16!}=\frac{14\times13\times12\times11\times10\times9}{16\times15\times14\times13\times12\times11}\]

Answer 10

@ap1usstudent Now do some cancellation to confirm the correct answer.