Question

a bag contains 8 white marbles and 3 black marbles.if one marble is taken out of the bag ramdom,then the probability that it is black is​

Answer 1

Answer:

Probability = 3/11

Step-by-step explanation:

Probability=/Total Number of Outcomes

Probability= $\frac{ Number of Favourable outcomes}{Total Outcomes}$

Favourable outcomes = 3

Total number of outcomes = 8 ++ 3 = 11

Probability = 3/11

Answer 2

Step-by-step explanation:

Solution :-

Given that

Number of White marbles in a bag n(W) = 8

Number of Black marbles in the bag n(B) = 3

Total number of all marbles in the box

= n(W)+n(B)

= 8+3

= 11

We have ,

Total number of all possible outcomes n(S) = 11

We know that

Probability of an event E is P(E) = Number of favourable outcomes / Total number of all possible outcomes

P(E) = n(E)/n(S)

Probability of getting black marble

=> P(B) = n(B)/n(S)

=> P(B) = 3/11

Answer :-

Probability of getting a black marble is 3/11

Used Formulae:-

♦ Probability of an event E is P(E) = Number of favourable outcomes / Total number of all possible outcomes