Question

in a box there are 12 black beads and some white bead . one bead is selected radomly . the probability of getting a white bead is 1/3 then what is the probability of getting a black bead and how many beads are there in the box​

Answer 1

Step-by-step explanation:

Probability of getting a black bead:

$1 - \frac{2}{3} = \frac{1}{3}$

Total number of beads = y

$\frac{1}{3} = \frac{12}{y} \\ y = 12 \times 3 = 36$

Answer 2

Answer:

Step-by-step explanation:

p(black beads ) =2/3

total number of beads = x

$1/3 = 12/x\\x = 12 * 3 = 36$