Question

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

Answer 1

Since the balls are drawn from the bag with replacement,

The probability of drawing a red ball=7/11

The probability of drawing a blue ball=4/11

These individual probabilities will remain constant across each draw.

There, probability of drawing two red balls=(7/11)*(7/11)=49/121

Probability of drawing two blue balls=(4/11)*(4/11)=16/121

Probability of drawing a blue ball and a red ball=(7/11)*(4/11)=28/121

Answer 2

Answer:

the probability of getting blue ball will be 4/11

total number of blue balls

total number of all balls