Question

By finding a gold nugget,a prospector is said to"strike it rich." If, on any given day, a prospector has probability 1/8 of striking it rich, what is the probability that at least one of the prospectors Al and Barb strike it rich on a day they both mine for gold?

Answer 1

if Al has a probability of 1/8 and so does Barb

remember that

P(A or B)=P(A)+P(B)−P(A and B)

Answer 2

@binarymimic ok soo.. what then lol

Answer 3

so.. the probability is .125? :P

Answer 4

What did you use for P(A), P(B), and P(A and B) ?

Answer 5

i plugged in 1/8 :)

Answer 6

P(A) is 1/8
P(B) is 1/8
but what did you get for P(A and B) ?

Answer 7

oh 2/8 lol

Answer 8

oh no we cant do that :)

Answer 9

otherwise we would get

1/8 + 1/8 - 2/8, and that = 0

Answer 10

P(A and B)
means the probability of both happening at the same time. we would actually multiply 1/8 * 1/8 to get P(A and B)

Answer 11

.015625 +.25= .265625

Answer 12

so that's the answer? =.=

Answer 13

yup .. isn't as pretty as your first answer but .. it is what it is

Answer 14

wait

Answer 15

you didn't subtract

Answer 16

thank you kind sir ^^

Answer 17

it should be

P(A) + P(B) - P(A and B)

1/8 + 1/8 - 1/64

Answer 18

.25-.015625=.234375
ok gotcha ;)

Answer 19

you got it :)
bye for now

Answer 20

:)