Question

In a box there are 10 white balls and 15 black balls two balls are drawn in succession what the probability that one ball is white and other is black

Answer 1

Answer:

1/2

Step-by-step explanation:

Draw a tree diagram:

P(WB) or P(WB)

NB:or is replaced by addition sign(+)

=(10/25×15/24) + (15/25×10/24)

=150/600+150/600

=300/600

=1/2

ans:1/2