Question

PLEASE HELP!!!

Answer 1

@satellite73

Answer 2

i would say A? i dont know, but that seems right to me

Answer 3

the answer is c but I am lost as to how that is right. (teacher gave us the answer but even he didn't know how to do it… )

Answer 4

So, he needs to fail in his first 3 attempts

Answer 5

whats the probability for failing in first attempt ?

Answer 6

ok so 3/7?

Answer 7

yes,
what about the probability for failing in second attempt ?

Answer 8

keepin mind, you're not replacing the tiles

Answer 9

2/7

Answer 10

you're picking the tile,
looking at it. and throwing it aside

Answer 11

think again

Answer 12

how can there be 7 tiles after u have thrown away one tile.. ?

Answer 13

:D oh yeah… 2/6 or 1/3

Answer 14

yes !
what about failing in third attempt ?

Answer 15

1/5

Answer 16

multiply them, what do u get

Answer 17

so do I do 3/7 x 2/6 x 1/5

or

3/7 x ⅓ x 1/5 ?

Answer 18

And probability for succeeding in 4th attempt is 1 cuz there are no bad tails remaining.

Answer 19

So the required probability is :

3/7 x 2/6 x 1/5 x 1

Answer 20

simplify

Answer 21

6/210 or 1/35

Answer 22

THANK YOU!!!

Answer 23

np :)

Answer 24

:D