Question

find the probability of drawing a blue ball from an urn containing 8 red, 6 blue, 5 white balls.

Answer 1

Hi there!
Here's the answer:

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In an Urn,
No. of red Balls = 8
No. of blue balls = 6
No. of white balls = 5

Total No. of balls = 8 + 6 + 5 = 19


Let S be sample space
n(S) - No. of ways of drawing a ball from 19 balls
=> n(S) = 19C1 = 19

Let E be the Event that ball drawn is blue
n(E) - No. of Favourable cases that satisfy occurrence of Event E
n(E) = 6C1 = 6

Probability = n(E)/n(S)
= 6/19


•°• Required Probability = 6/19

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Hope it helps

Answer 2

So the total number of balls are

8+6+5

19

The number of blue balls are 6

So the probability of drawing blue balls is

6/19

Hope it helps you