Question

A bag contains 2 red and 5white balls.another bag contains 3red and 4 white balls. ine bagisselected at random and a ball is drawn from it if the ball is white ,find the probability that it is drawn from first bag.

Answer 1

the answer will be 2/5

Answer 2

Answer:

Since, total no. of balls = 7+5+3 = 15

(i) No. of balls that are red or white = 7+5 = 12

∴ Required probability =

$\frac{12}{15} = \frac{4}{5}$

(ii) No. of balls that are not black = 7+5 = 12

∴ Required probability =

$\frac{12}{15} = \frac{4}{5}$

(iii) No. of balls that are neither white nor black = 7

∴ Required probability =

$\frac{15}{7}$