Question

Five marbles are randomly selected with replacement. The probability that a black marble is chosen is 15%. What is the probability that at least 2 marbles are black?

a) 0.86

b) 0.84

c) 0.16

d) 0.14

Answer 1

at least 2 means 2 or 3 or 4 or 5
too hard
find the probability that you get none or one, then subtract that answer from 1

Answer 2

you know how to do that?

Answer 3

no, can you explain please

Answer 4

the probability you get a black marble is 15%
what is the probability you not get a black marble ?

Answer 5

another to ask this is what is 100% - 15% ?

Answer 6

85%