Question

a bag contains 7 red balls and 4 blue balls ,what is the probability of getting a blue ball in draw?​

Answer 1

Answer:

we have to get 3 more balls to get it draw

Step-by-step explanation:

7-4=3

so 3 is ur correct answer

Answer 2

Step-by-step explanation:

On each drawing, total balls =11

Red balls =4,

Black balls =7

(i) P(two red balls) =114×114=12116

(ii) P(two black balls)=117×117=12149 

(iii) red ball can be in first or second draw

⇒ P(one red and one black ball) = 2×(114)(117)=12156

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