Question

a bag contains 6 blue ball and 4 black ball. 3 ball pick up randomly then how many possibly it contains 3 blue ball​

Answer 1

Answer:

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