Question

A bag contains 7 balls in which 3 balls are black and 4 balls are white.From the bag one balls is drawn without looking then find : (a) Probability that the ball is black (b) Probability that the ball is white.​

Answer 1

Answer:

(a) probability the ball is black

Answer 2

Probability of ( getting an event ) =

$\frac{favourble \: outcomes}{total \: no. \: of \: outcoms}$

a) P ( getting a black ball ) =

$\frac{3}{7}$

b) P ( getting a white ball ) =

$\frac{4}{7}$

Hope it helps