Question

a bag contains 6 red ball it black ball and 13 Blue Balls A ball is drawn out of the bag at random the probability of getting a blue or a black ball is_.
A) 8/9
B) 7/9
C) 5/9
D) 4/9​

Answer 1

Answer:

Total no. of balls=4+6+3=13

Total no. of ways one ball out of 7,n(S)=13C

1

No.of ways of drawing 1 ball,none of then is blue,n(E)=13−6=7C

1

∴probability=

n(S)

n(E)

=

13

7