Question

A bag has 4 red balls , 2 blue balls and 2 green balls, what is the probability of getting a red ball randomly?​

Answer 1

Answer:

1/2

Step-by-step explanation:

probability of getting red ball is

no of red balls/total number of balls

4/8=1/2

ANSWERED BY GAUTHMATH

Answer 2

Answer:

1/3

Step-by-step explanation:

If A and B are two events in a sample space S, then the conditional probability of A given B is defined as P(A|B)=P(A and B)/P(B), when P(B)>0.

Prob of red ball = 2/(2+4) = 2/6 =1/3

Prob of green ball = 4/(6-1) = 4/5

Conditional prob of drawing red ball first, given green ball is drawn second, without replacement, is:

(1/3 x 4/5)/4/5

= 4/15 x 5/4

= 1/3