Question

a drawer contains 10 white and 6 black balls. what is the probability of randomly drawing a white and the black ball?
help plz..

Answer 1

@hartnn a drawer contains 10 white and 6 black balls. what is the probability of randomly drawing a white and the black ball?
help plz..

Answer 2

can you find the probability of drawing 1 black ball only from that drawer ?

Answer 3

The total is 16 balls. The probability of drawing a white ball would be 6 out of 16 (6/16)which reduces to 3/10

Answer 4

@ AlexysA can you explain why it reduces to 3/10?

Answer 5

if there are x black balls in a box with total y balls, the probability of drawing a black ball = x/y right ?
here, what the probability of drawing a black ball=....?
the probability of drawing a white ball=....?
then, probability of randomly drawing a white and the black ball is just the product of these 2 events as they are independent.

Answer 6

@ hartnn 6/16 for black and 10/16 for white thats its correct??then multiplied this two events?

Answer 7

yes, you can just take the product since these 2 events are independent.

Answer 8

and yes, those are correct.

Answer 9

(6/16)x(10/16)=.234..there is no .234 in the choices..the choices are .36,.208,.25 and .3..

Answer 10

ohh...its drawing a white and "then" black ball?

Answer 11

so, first there are 16 balls, for white ball its 6/16
then since white ball is drawn out, there are only 15 balls left, so for black ball its
10/15
now multiply them ....

Answer 12

a white and a black ball..

Answer 13

a white and a black ball ----> means without replacement, which is what i assumed.

Answer 14

thanks a lot..

Answer 15

welcome :)

Answer 16

how about two white balls??is this correct??(10/16)(9/15)??

Answer 17

without replacement, yes, its correct.